diff --git a/test/core/end2end/end2end_nosec_tests.c b/test/core/end2end/end2end_nosec_tests.c
index caaa97c215b..7e9b6eb233c 100644
--- a/test/core/end2end/end2end_nosec_tests.c
+++ b/test/core/end2end/end2end_nosec_tests.c
@@ -416,3 +416,16 @@ void grpc_end2end_tests(int argc, char **argv,
     abort();
   }
 }
+
+const char *get_host_override_string(const char *str,
+                                     grpc_end2end_test_config config) {
+  return (config.feature_mask & FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER ? str
+                                                                       : NULL);
+}
+
+void validate_host_override_string(const char *pattern, const char *str,
+                                   grpc_end2end_test_config config) {
+  if (config.feature_mask & FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER) {
+    GPR_ASSERT(0 == strcmp(str, pattern));
+  }
+}
diff --git a/test/core/end2end/end2end_tests.c b/test/core/end2end/end2end_tests.c
index 6d17e686e61..0fbad226414 100644
--- a/test/core/end2end/end2end_tests.c
+++ b/test/core/end2end/end2end_tests.c
@@ -424,3 +424,16 @@ void grpc_end2end_tests(int argc, char **argv,
     abort();
   }
 }
+
+const char *get_host_override_string(const char *str,
+                                     grpc_end2end_test_config config) {
+  return (config.feature_mask & FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER ? str
+                                                                       : NULL);
+}
+
+void validate_host_override_string(const char *pattern, const char *str,
+                                   grpc_end2end_test_config config) {
+  if (config.feature_mask & FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER) {
+    GPR_ASSERT(0 == strcmp(str, pattern));
+  }
+}
diff --git a/test/core/end2end/end2end_tests.h b/test/core/end2end/end2end_tests.h
index b56b595cc51..f25e90b5f61 100644
--- a/test/core/end2end/end2end_tests.h
+++ b/test/core/end2end/end2end_tests.h
@@ -44,6 +44,7 @@ typedef struct grpc_end2end_test_config grpc_end2end_test_config;
 #define FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS 4
 #define FEATURE_MASK_SUPPORTS_REQUEST_PROXYING 8
 #define FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL 16
+#define FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER 32
 
 #define FAIL_AUTH_CHECK_SERVER_ARG_NAME "fail_auth_check"
 
@@ -69,4 +70,10 @@ struct grpc_end2end_test_config {
 void grpc_end2end_tests_pre_init(void);
 void grpc_end2end_tests(int argc, char **argv, grpc_end2end_test_config config);
 
+const char *get_host_override_string(const char *str,
+                                     grpc_end2end_test_config config);
+
+void validate_host_override_string(const char *pattern, const char *str,
+                                   grpc_end2end_test_config config);
+
 #endif /* GRPC_TEST_CORE_END2END_END2END_TESTS_H */
diff --git a/test/core/end2end/fixtures/h2_census.c b/test/core/end2end/fixtures/h2_census.c
index c8d1a90a974..c52d7660f59 100644
--- a/test/core/end2end/fixtures/h2_census.c
+++ b/test/core/end2end/fixtures/h2_census.c
@@ -112,7 +112,8 @@ void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
     {"chttp2/fullstack+census", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
-                                    FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+                                    FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+                                    FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_fullstack, chttp2_init_client_fullstack,
      chttp2_init_server_fullstack, chttp2_tear_down_fullstack},
 };
diff --git a/test/core/end2end/fixtures/h2_compress.c b/test/core/end2end/fixtures/h2_compress.c
index b4a2b0ddd52..fedd2ebc467 100644
--- a/test/core/end2end/fixtures/h2_compress.c
+++ b/test/core/end2end/fixtures/h2_compress.c
@@ -114,7 +114,8 @@ void chttp2_tear_down_fullstack_compression(grpc_end2end_test_fixture *f) {
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
     {"chttp2/fullstack_compression", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
-                                         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+                                         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+                                         FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_fullstack_compression,
      chttp2_init_client_fullstack_compression,
      chttp2_init_server_fullstack_compression,
diff --git a/test/core/end2end/fixtures/h2_fakesec.c b/test/core/end2end/fixtures/h2_fakesec.c
index 9a8739a1dec..c9747913c2f 100644
--- a/test/core/end2end/fixtures/h2_fakesec.c
+++ b/test/core/end2end/fixtures/h2_fakesec.c
@@ -141,7 +141,8 @@ static grpc_end2end_test_config configs[] = {
     {"chttp2/fake_secure_fullstack",
      FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
          FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS |
-         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+         FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_secure_fullstack,
      chttp2_init_client_fake_secure_fullstack,
      chttp2_init_server_fake_secure_fullstack,
diff --git a/test/core/end2end/fixtures/h2_fd.c b/test/core/end2end/fixtures/h2_fd.c
index e9fd6668ed0..223fadc386d 100644
--- a/test/core/end2end/fixtures/h2_fd.c
+++ b/test/core/end2end/fixtures/h2_fd.c
@@ -111,9 +111,9 @@ static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture *f) {
 
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
-    {"chttp2/fd", 0, chttp2_create_fixture_socketpair,
-     chttp2_init_client_socketpair, chttp2_init_server_socketpair,
-     chttp2_tear_down_socketpair},
+    {"chttp2/fd", FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
+     chttp2_create_fixture_socketpair, chttp2_init_client_socketpair,
+     chttp2_init_server_socketpair, chttp2_tear_down_socketpair},
 };
 
 int main(int argc, char **argv) {
diff --git a/test/core/end2end/fixtures/h2_full+pipe.c b/test/core/end2end/fixtures/h2_full+pipe.c
index 74ed021ce8c..c6013f30400 100644
--- a/test/core/end2end/fixtures/h2_full+pipe.c
+++ b/test/core/end2end/fixtures/h2_full+pipe.c
@@ -103,7 +103,8 @@ void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
     {"chttp2/fullstack", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
-                             FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+                             FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+                             FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_fullstack, chttp2_init_client_fullstack,
      chttp2_init_server_fullstack, chttp2_tear_down_fullstack},
 };
diff --git a/test/core/end2end/fixtures/h2_full+trace.c b/test/core/end2end/fixtures/h2_full+trace.c
index b2fd490df28..11a102a5765 100644
--- a/test/core/end2end/fixtures/h2_full+trace.c
+++ b/test/core/end2end/fixtures/h2_full+trace.c
@@ -103,7 +103,8 @@ void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
     {"chttp2/fullstack", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
-                             FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+                             FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+                             FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_fullstack, chttp2_init_client_fullstack,
      chttp2_init_server_fullstack, chttp2_tear_down_fullstack},
 };
diff --git a/test/core/end2end/fixtures/h2_full.c b/test/core/end2end/fixtures/h2_full.c
index e87382edae0..3399f1981e4 100644
--- a/test/core/end2end/fixtures/h2_full.c
+++ b/test/core/end2end/fixtures/h2_full.c
@@ -97,7 +97,8 @@ void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
     {"chttp2/fullstack", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
-                             FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+                             FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+                             FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_fullstack, chttp2_init_client_fullstack,
      chttp2_init_server_fullstack, chttp2_tear_down_fullstack},
 };
diff --git a/test/core/end2end/fixtures/h2_http_proxy.c b/test/core/end2end/fixtures/h2_http_proxy.c
index f0720c4f512..44b223664ab 100644
--- a/test/core/end2end/fixtures/h2_http_proxy.c
+++ b/test/core/end2end/fixtures/h2_http_proxy.c
@@ -108,7 +108,8 @@ void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
     {"chttp2/fullstack", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
-                             FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+                             FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+                             FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_fullstack, chttp2_init_client_fullstack,
      chttp2_init_server_fullstack, chttp2_tear_down_fullstack},
 };
diff --git a/test/core/end2end/fixtures/h2_load_reporting.c b/test/core/end2end/fixtures/h2_load_reporting.c
index 3b3a1449bc3..7a76489b440 100644
--- a/test/core/end2end/fixtures/h2_load_reporting.c
+++ b/test/core/end2end/fixtures/h2_load_reporting.c
@@ -104,7 +104,8 @@ void chttp2_tear_down_load_reporting(grpc_end2end_test_fixture *f) {
 static grpc_end2end_test_config configs[] = {
     {"chttp2/fullstack+load_reporting",
      FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
-         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+         FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_load_reporting, chttp2_init_client_load_reporting,
      chttp2_init_server_load_reporting, chttp2_tear_down_load_reporting},
 };
diff --git a/test/core/end2end/fixtures/h2_oauth2.c b/test/core/end2end/fixtures/h2_oauth2.c
index eca866f93b1..6122f4f2f93 100644
--- a/test/core/end2end/fixtures/h2_oauth2.c
+++ b/test/core/end2end/fixtures/h2_oauth2.c
@@ -217,7 +217,8 @@ static grpc_end2end_test_config configs[] = {
     {"chttp2/simple_ssl_with_oauth2_fullstack",
      FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
          FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS |
-         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+         FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_secure_fullstack,
      chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack,
      chttp2_init_server_simple_ssl_secure_fullstack,
diff --git a/test/core/end2end/fixtures/h2_proxy.c b/test/core/end2end/fixtures/h2_proxy.c
index 65469b73c58..9e37ed4db34 100644
--- a/test/core/end2end/fixtures/h2_proxy.c
+++ b/test/core/end2end/fixtures/h2_proxy.c
@@ -115,7 +115,8 @@ void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
 static grpc_end2end_test_config configs[] = {
     {"chttp2/fullstack+proxy", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
                                    FEATURE_MASK_SUPPORTS_REQUEST_PROXYING |
-                                   FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+                                   FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+                                   FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_fullstack, chttp2_init_client_fullstack,
      chttp2_init_server_fullstack, chttp2_tear_down_fullstack},
 };
diff --git a/test/core/end2end/fixtures/h2_sockpair+trace.c b/test/core/end2end/fixtures/h2_sockpair+trace.c
index 164828cb57d..726ed8735c6 100644
--- a/test/core/end2end/fixtures/h2_sockpair+trace.c
+++ b/test/core/end2end/fixtures/h2_sockpair+trace.c
@@ -141,9 +141,9 @@ static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture *f) {
 
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
-    {"chttp2/socketpair", 0, chttp2_create_fixture_socketpair,
-     chttp2_init_client_socketpair, chttp2_init_server_socketpair,
-     chttp2_tear_down_socketpair},
+    {"chttp2/socketpair", FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
+     chttp2_create_fixture_socketpair, chttp2_init_client_socketpair,
+     chttp2_init_server_socketpair, chttp2_tear_down_socketpair},
 };
 
 int main(int argc, char **argv) {
diff --git a/test/core/end2end/fixtures/h2_sockpair.c b/test/core/end2end/fixtures/h2_sockpair.c
index 182583ce05b..94b2623b3ea 100644
--- a/test/core/end2end/fixtures/h2_sockpair.c
+++ b/test/core/end2end/fixtures/h2_sockpair.c
@@ -135,9 +135,9 @@ static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture *f) {
 
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
-    {"chttp2/socketpair", 0, chttp2_create_fixture_socketpair,
-     chttp2_init_client_socketpair, chttp2_init_server_socketpair,
-     chttp2_tear_down_socketpair},
+    {"chttp2/socketpair", FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
+     chttp2_create_fixture_socketpair, chttp2_init_client_socketpair,
+     chttp2_init_server_socketpair, chttp2_tear_down_socketpair},
 };
 
 int main(int argc, char **argv) {
diff --git a/test/core/end2end/fixtures/h2_sockpair_1byte.c b/test/core/end2end/fixtures/h2_sockpair_1byte.c
index 218d5f2cb47..0a45f763953 100644
--- a/test/core/end2end/fixtures/h2_sockpair_1byte.c
+++ b/test/core/end2end/fixtures/h2_sockpair_1byte.c
@@ -135,9 +135,10 @@ static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture *f) {
 
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
-    {"chttp2/socketpair_one_byte_at_a_time", 0,
-     chttp2_create_fixture_socketpair, chttp2_init_client_socketpair,
-     chttp2_init_server_socketpair, chttp2_tear_down_socketpair},
+    {"chttp2/socketpair_one_byte_at_a_time",
+     FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER, chttp2_create_fixture_socketpair,
+     chttp2_init_client_socketpair, chttp2_init_server_socketpair,
+     chttp2_tear_down_socketpair},
 };
 
 int main(int argc, char **argv) {
diff --git a/test/core/end2end/fixtures/h2_ssl.c b/test/core/end2end/fixtures/h2_ssl.c
index 23b6f9f73a1..bbd522cf309 100644
--- a/test/core/end2end/fixtures/h2_ssl.c
+++ b/test/core/end2end/fixtures/h2_ssl.c
@@ -152,7 +152,8 @@ static grpc_end2end_test_config configs[] = {
     {"chttp2/simple_ssl_fullstack",
      FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
          FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS |
-         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+         FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_secure_fullstack,
      chttp2_init_client_simple_ssl_secure_fullstack,
      chttp2_init_server_simple_ssl_secure_fullstack,
diff --git a/test/core/end2end/fixtures/h2_ssl_proxy.c b/test/core/end2end/fixtures/h2_ssl_proxy.c
index a7490d13ec6..27cf3ebf326 100644
--- a/test/core/end2end/fixtures/h2_ssl_proxy.c
+++ b/test/core/end2end/fixtures/h2_ssl_proxy.c
@@ -186,7 +186,8 @@ static grpc_end2end_test_config configs[] = {
      FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
          FEATURE_MASK_SUPPORTS_REQUEST_PROXYING |
          FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS |
-         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+         FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+         FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_secure_fullstack,
      chttp2_init_client_simple_ssl_secure_fullstack,
      chttp2_init_server_simple_ssl_secure_fullstack,
diff --git a/test/core/end2end/fixtures/h2_uds.c b/test/core/end2end/fixtures/h2_uds.c
index 0a17ff5860a..bc973ea8e3c 100644
--- a/test/core/end2end/fixtures/h2_uds.c
+++ b/test/core/end2end/fixtures/h2_uds.c
@@ -102,7 +102,8 @@ void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
     {"chttp2/fullstack_uds", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
-                                 FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL,
+                                 FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+                                 FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_fullstack, chttp2_init_client_fullstack,
      chttp2_init_server_fullstack, chttp2_tear_down_fullstack},
 };
diff --git a/test/core/end2end/tests/binary_metadata.c b/test/core/end2end/tests/binary_metadata.c
index 6b105def33c..f1ebbbb66f4 100644
--- a/test/core/end2end/tests/binary_metadata.c
+++ b/test/core/end2end/tests/binary_metadata.c
@@ -146,8 +146,10 @@ static void test_request_response_with_metadata_and_payload(
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -248,7 +250,8 @@ static void test_request_response_with_metadata_and_payload(
   GPR_ASSERT(status == GRPC_STATUS_OK);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 0);
   GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, "hello world"));
   GPR_ASSERT(byte_buffer_eq_string(response_payload_recv, "hello you"));
diff --git a/test/core/end2end/tests/call_creds.c b/test/core/end2end/tests/call_creds.c
index 981c0fcc8c5..8bde79c4001 100644
--- a/test/core/end2end/tests/call_creds.c
+++ b/test/core/end2end/tests/call_creds.c
@@ -164,8 +164,10 @@ static void request_response_with_payload_and_call_creds(
   f = begin_test(config, test_name, 0);
   cqv = cq_verifier_create(f.cq);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
   creds = grpc_google_iam_credentials_create(iam_token, iam_selector, NULL);
   GPR_ASSERT(creds != NULL);
@@ -294,7 +296,8 @@ static void request_response_with_payload_and_call_creds(
   GPR_ASSERT(status == GRPC_STATUS_OK);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 0);
   GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, "hello world"));
   GPR_ASSERT(byte_buffer_eq_string(response_payload_recv, "hello you"));
@@ -397,8 +400,10 @@ static void test_request_with_server_rejecting_client_creds(
   f = begin_test(config, "test_request_with_server_rejecting_client_creds", 1);
   cqv = cq_verifier_create(f.cq);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   creds = grpc_google_iam_credentials_create(iam_token, iam_selector, NULL);
diff --git a/test/core/end2end/tests/cancel_after_accept.c b/test/core/end2end/tests/cancel_after_accept.c
index 768416a108c..fd03432ff54 100644
--- a/test/core/end2end/tests/cancel_after_accept.c
+++ b/test/core/end2end/tests/cancel_after_accept.c
@@ -151,9 +151,10 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
       begin_test(config, "cancel_after_accept", args, NULL);
   cq_verifier *cqv = cq_verifier_create(f.cq);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/service/method", "foo.test.google.fr",
-                               deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/service/method",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
diff --git a/test/core/end2end/tests/cancel_after_client_done.c b/test/core/end2end/tests/cancel_after_client_done.c
index 5adc71e2552..26de66eba79 100644
--- a/test/core/end2end/tests/cancel_after_client_done.c
+++ b/test/core/end2end/tests/cancel_after_client_done.c
@@ -125,8 +125,10 @@ static void test_cancel_after_accept_and_writes_closed(
       grpc_raw_byte_buffer_create(&response_payload_slice, 1);
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
diff --git a/test/core/end2end/tests/cancel_after_invoke.c b/test/core/end2end/tests/cancel_after_invoke.c
index 85d8799f36d..afbfb02a39e 100644
--- a/test/core/end2end/tests/cancel_after_invoke.c
+++ b/test/core/end2end/tests/cancel_after_invoke.c
@@ -120,8 +120,10 @@ static void test_cancel_after_invoke(grpc_end2end_test_config config,
   grpc_byte_buffer *request_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
diff --git a/test/core/end2end/tests/cancel_before_invoke.c b/test/core/end2end/tests/cancel_before_invoke.c
index c57091476e4..d0eeed8ab88 100644
--- a/test/core/end2end/tests/cancel_before_invoke.c
+++ b/test/core/end2end/tests/cancel_before_invoke.c
@@ -118,8 +118,10 @@ static void test_cancel_before_invoke(grpc_end2end_test_config config,
   grpc_byte_buffer *request_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   GPR_ASSERT(GRPC_CALL_OK == grpc_call_cancel(c, NULL));
diff --git a/test/core/end2end/tests/cancel_in_a_vacuum.c b/test/core/end2end/tests/cancel_in_a_vacuum.c
index 3b03616b3bb..5be850b6ea9 100644
--- a/test/core/end2end/tests/cancel_in_a_vacuum.c
+++ b/test/core/end2end/tests/cancel_in_a_vacuum.c
@@ -105,8 +105,10 @@ static void test_cancel_in_a_vacuum(grpc_end2end_test_config config,
   gpr_timespec deadline = five_seconds_time();
   cq_verifier *v_client = cq_verifier_create(f.cq);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   GPR_ASSERT(GRPC_CALL_OK == mode.initiate_cancel(c, NULL));
diff --git a/test/core/end2end/tests/cancel_with_status.c b/test/core/end2end/tests/cancel_with_status.c
index e65390ac4a5..3aecaf71598 100644
--- a/test/core/end2end/tests/cancel_with_status.c
+++ b/test/core/end2end/tests/cancel_with_status.c
@@ -97,7 +97,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void simple_request_body(grpc_end2end_test_fixture f, size_t num_ops) {
+static void simple_request_body(grpc_end2end_test_config config,
+                                grpc_end2end_test_fixture f, size_t num_ops) {
   grpc_call *c;
   gpr_timespec deadline = five_seconds_time();
   cq_verifier *cqv = cq_verifier_create(f.cq);
@@ -112,9 +113,10 @@ static void simple_request_body(grpc_end2end_test_fixture f, size_t num_ops) {
 
   gpr_log(GPR_DEBUG, "test with %" PRIuPTR " ops", num_ops);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -170,7 +172,7 @@ static void test_invoke_simple_request(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
 
   f = begin_test(config, "test_invoke_simple_request", NULL, NULL);
-  simple_request_body(f, num_ops);
+  simple_request_body(config, f, num_ops);
   end_test(&f);
   config.tear_down_data(&f);
 }
diff --git a/test/core/end2end/tests/compressed_payload.c b/test/core/end2end/tests/compressed_payload.c
index 1724da4d0cf..166e8efe378 100644
--- a/test/core/end2end/tests/compressed_payload.c
+++ b/test/core/end2end/tests/compressed_payload.c
@@ -146,8 +146,10 @@ static void request_for_disabled_algorithm(
   f = begin_test(config, test_name, client_args, server_args);
   cqv = cq_verifier_create(f.cq);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -242,7 +244,8 @@ static void request_for_disabled_algorithm(
   GPR_ASSERT(0 == strcmp(details, expected_details));
   gpr_free(expected_details);
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
 
   gpr_free(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
@@ -318,8 +321,10 @@ static void request_with_payload_template(
   f = begin_test(config, test_name, client_args, server_args);
   cqv = cq_verifier_create(f.cq);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -491,7 +496,8 @@ static void request_with_payload_template(
   GPR_ASSERT(status == GRPC_STATUS_OK);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 0);
 
   gpr_free(details);
diff --git a/test/core/end2end/tests/disappearing_server.c b/test/core/end2end/tests/disappearing_server.c
index a0059b9ad59..8ebf7e643e0 100644
--- a/test/core/end2end/tests/disappearing_server.c
+++ b/test/core/end2end/tests/disappearing_server.c
@@ -79,7 +79,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void do_request_and_shutdown_server(grpc_end2end_test_fixture *f,
+static void do_request_and_shutdown_server(grpc_end2end_test_config config,
+                                           grpc_end2end_test_fixture *f,
                                            cq_verifier *cqv) {
   grpc_call *c;
   grpc_call *s;
@@ -96,9 +97,10 @@ static void do_request_and_shutdown_server(grpc_end2end_test_fixture *f,
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f->client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f->client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -174,7 +176,8 @@ static void do_request_and_shutdown_server(grpc_end2end_test_fixture *f,
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
@@ -196,12 +199,12 @@ static void disappearing_server_test(grpc_end2end_test_config config) {
   config.init_client(&f, NULL);
   config.init_server(&f, NULL);
 
-  do_request_and_shutdown_server(&f, cqv);
+  do_request_and_shutdown_server(config, &f, cqv);
 
   /* now destroy and recreate the server */
   config.init_server(&f, NULL);
 
-  do_request_and_shutdown_server(&f, cqv);
+  do_request_and_shutdown_server(config, &f, cqv);
 
   cq_verifier_destroy(cqv);
 
diff --git a/test/core/end2end/tests/empty_batch.c b/test/core/end2end/tests/empty_batch.c
index ac53e1839be..dc8e52a60f0 100644
--- a/test/core/end2end/tests/empty_batch.c
+++ b/test/core/end2end/tests/empty_batch.c
@@ -97,15 +97,18 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void empty_batch_body(grpc_end2end_test_fixture f) {
+static void empty_batch_body(grpc_end2end_test_config config,
+                             grpc_end2end_test_fixture f) {
   grpc_call *c;
   gpr_timespec deadline = five_seconds_time();
   cq_verifier *cqv = cq_verifier_create(f.cq);
   grpc_call_error error;
   grpc_op *op = NULL;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   error = grpc_call_start_batch(c, op, 0, tag(1), NULL);
@@ -122,7 +125,7 @@ static void test_invoke_empty_body(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f;
 
   f = begin_test(config, "test_invoke_empty_body", NULL, NULL);
-  empty_batch_body(f);
+  empty_batch_body(config, f);
   end_test(&f);
   config.tear_down_data(&f);
 }
diff --git a/test/core/end2end/tests/filter_call_init_fails.c b/test/core/end2end/tests/filter_call_init_fails.c
index a70f50af988..84d95b20b8a 100644
--- a/test/core/end2end/tests/filter_call_init_fails.c
+++ b/test/core/end2end/tests/filter_call_init_fails.c
@@ -127,8 +127,10 @@ static void test_request(grpc_end2end_test_config config) {
   char *details = NULL;
   size_t details_capacity = 0;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
diff --git a/test/core/end2end/tests/filter_causes_close.c b/test/core/end2end/tests/filter_causes_close.c
index f14bb323f27..51e56d74a34 100644
--- a/test/core/end2end/tests/filter_causes_close.c
+++ b/test/core/end2end/tests/filter_causes_close.c
@@ -123,8 +123,10 @@ static void test_request(grpc_end2end_test_config config) {
   char *details = NULL;
   size_t details_capacity = 0;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
diff --git a/test/core/end2end/tests/graceful_server_shutdown.c b/test/core/end2end/tests/graceful_server_shutdown.c
index 29347a068ae..5fecadbe441 100644
--- a/test/core/end2end/tests/graceful_server_shutdown.c
+++ b/test/core/end2end/tests/graceful_server_shutdown.c
@@ -111,8 +111,10 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -190,7 +192,8 @@ static void test_early_server_shutdown_finishes_inflight_calls(
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
diff --git a/test/core/end2end/tests/high_initial_seqno.c b/test/core/end2end/tests/high_initial_seqno.c
index dab527005cf..01a4909ccdb 100644
--- a/test/core/end2end/tests/high_initial_seqno.c
+++ b/test/core/end2end/tests/high_initial_seqno.c
@@ -99,7 +99,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void simple_request_body(grpc_end2end_test_fixture f) {
+static void simple_request_body(grpc_end2end_test_config config,
+                                grpc_end2end_test_fixture f) {
   grpc_call *c;
   grpc_call *s;
   gpr_timespec deadline = five_seconds_time();
@@ -116,9 +117,10 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -189,7 +191,8 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
@@ -229,7 +232,7 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config,
                initial_sequence_number);
   f = begin_test(config, name, &client_args, NULL);
   for (i = 0; i < 10; i++) {
-    simple_request_body(f);
+    simple_request_body(config, f);
     gpr_log(GPR_INFO, "Passed simple request %d", i);
   }
   end_test(&f);
diff --git a/test/core/end2end/tests/hpack_size.c b/test/core/end2end/tests/hpack_size.c
index fb00ae4eaaa..cec8b2faae1 100644
--- a/test/core/end2end/tests/hpack_size.c
+++ b/test/core/end2end/tests/hpack_size.c
@@ -239,7 +239,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void simple_request_body(grpc_end2end_test_fixture f, size_t index) {
+static void simple_request_body(grpc_end2end_test_config config,
+                                grpc_end2end_test_fixture f, size_t index) {
   grpc_call *c;
   grpc_call *s;
   gpr_timespec deadline = five_seconds_time();
@@ -268,9 +269,10 @@ static void simple_request_body(grpc_end2end_test_fixture f, size_t index) {
   extra_metadata[2].value = dragons[index % GPR_ARRAY_SIZE(dragons)];
   extra_metadata[2].value_length = strlen(extra_metadata[2].value);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -342,7 +344,8 @@ static void simple_request_body(grpc_end2end_test_fixture f, size_t index) {
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
@@ -383,7 +386,7 @@ static void test_size(grpc_end2end_test_config config, int encode_size,
   f = begin_test(config, name, encode_size != 4096 ? &client_args : NULL,
                  decode_size != 4096 ? &server_args : NULL);
   for (i = 0; i < 4 * GPR_ARRAY_SIZE(hobbits); i++) {
-    simple_request_body(f, i);
+    simple_request_body(config, f, i);
   }
   end_test(&f);
   config.tear_down_data(&f);
diff --git a/test/core/end2end/tests/idempotent_request.c b/test/core/end2end/tests/idempotent_request.c
index 65f6dd08c5a..4f6d3bb808c 100644
--- a/test/core/end2end/tests/idempotent_request.c
+++ b/test/core/end2end/tests/idempotent_request.c
@@ -97,7 +97,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void simple_request_body(grpc_end2end_test_fixture f) {
+static void simple_request_body(grpc_end2end_test_config config,
+                                grpc_end2end_test_fixture f) {
   grpc_call *c;
   grpc_call *s;
   gpr_timespec deadline = five_seconds_time();
@@ -115,9 +116,10 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   int was_cancelled = 2;
   char *peer;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   peer = grpc_call_get_peer(c);
@@ -202,7 +204,8 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST == call_details.flags);
   GPR_ASSERT(was_cancelled == 1);
 
@@ -222,7 +225,7 @@ static void test_invoke_simple_request(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f;
 
   f = begin_test(config, "test_invoke_simple_request", NULL, NULL);
-  simple_request_body(f);
+  simple_request_body(config, f);
   end_test(&f);
   config.tear_down_data(&f);
 }
@@ -232,7 +235,7 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f =
       begin_test(config, "test_invoke_10_simple_requests", NULL, NULL);
   for (i = 0; i < 10; i++) {
-    simple_request_body(f);
+    simple_request_body(config, f);
     gpr_log(GPR_INFO, "Passed simple request %d", i);
   }
   end_test(&f);
diff --git a/test/core/end2end/tests/invoke_large_request.c b/test/core/end2end/tests/invoke_large_request.c
index 1df237cb6c4..edb655fea5b 100644
--- a/test/core/end2end/tests/invoke_large_request.c
+++ b/test/core/end2end/tests/invoke_large_request.c
@@ -144,8 +144,10 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -244,7 +246,8 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
diff --git a/test/core/end2end/tests/large_metadata.c b/test/core/end2end/tests/large_metadata.c
index eb174a2dbb7..499c56413ba 100644
--- a/test/core/end2end/tests/large_metadata.c
+++ b/test/core/end2end/tests/large_metadata.c
@@ -125,8 +125,10 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   meta.key = "key";
@@ -227,7 +229,8 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   GPR_ASSERT(status == GRPC_STATUS_OK);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 0);
   GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, "hello world"));
   GPR_ASSERT(contains_metadata(&request_metadata_recv, "key", meta.value));
diff --git a/test/core/end2end/tests/load_reporting_hook.c b/test/core/end2end/tests/load_reporting_hook.c
index 7f95dfd949b..ca4e2709a92 100644
--- a/test/core/end2end/tests/load_reporting_hook.c
+++ b/test/core/end2end/tests/load_reporting_hook.c
@@ -121,12 +121,10 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void request_response_with_payload(grpc_end2end_test_fixture f,
-                                          const char *method_name,
-                                          const char *request_msg,
-                                          const char *response_msg,
-                                          grpc_metadata *initial_lr_metadata,
-                                          grpc_metadata *trailing_lr_metadata) {
+static void request_response_with_payload(
+    grpc_end2end_test_config config, grpc_end2end_test_fixture f,
+    const char *method_name, const char *request_msg, const char *response_msg,
+    grpc_metadata *initial_lr_metadata, grpc_metadata *trailing_lr_metadata) {
   gpr_slice request_payload_slice = gpr_slice_from_static_string(request_msg);
   gpr_slice response_payload_slice = gpr_slice_from_static_string(response_msg);
   grpc_call *c;
@@ -151,9 +149,10 @@ static void request_response_with_payload(grpc_end2end_test_fixture f,
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               method_name, "foo.test.google.fr", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, method_name,
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -307,8 +306,9 @@ static void test_load_reporting_hook(grpc_end2end_test_config config) {
   memset(&trailing_lr_metadata.internal_data, 0,
          sizeof(trailing_lr_metadata.internal_data));
 
-  request_response_with_payload(f, method_name, request_msg, response_msg,
-                                &initial_lr_metadata, &trailing_lr_metadata);
+  request_response_with_payload(config, f, method_name, request_msg,
+                                response_msg, &initial_lr_metadata,
+                                &trailing_lr_metadata);
   end_test(&f);
   grpc_channel_args_destroy(lr_server_args);
   config.tear_down_data(&f);
diff --git a/test/core/end2end/tests/max_concurrent_streams.c b/test/core/end2end/tests/max_concurrent_streams.c
index 65fa9468387..9338bc5f0d7 100644
--- a/test/core/end2end/tests/max_concurrent_streams.c
+++ b/test/core/end2end/tests/max_concurrent_streams.c
@@ -95,7 +95,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void simple_request_body(grpc_end2end_test_fixture f) {
+static void simple_request_body(grpc_end2end_test_config config,
+                                grpc_end2end_test_fixture f) {
   grpc_call *c;
   grpc_call *s;
   gpr_timespec deadline = five_seconds_time();
@@ -112,9 +113,10 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -185,7 +187,8 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
@@ -250,20 +253,22 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
 
   /* perform a ping-pong to ensure that settings have had a chance to round
      trip */
-  simple_request_body(f);
+  simple_request_body(config, f);
   /* perform another one to make sure that the one stream case still works */
-  simple_request_body(f);
+  simple_request_body(config, f);
 
   /* start two requests - ensuring that the second is not accepted until
      the first completes */
   deadline = n_seconds_time(1000);
-  c1 = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                                "/alpha", "foo.test.google.fr:1234", deadline,
-                                NULL);
+  c1 = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/alpha",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c1);
-  c2 = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                                "/beta", "foo.test.google.fr:1234", deadline,
-                                NULL);
+  c2 = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/beta",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c2);
 
   GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
diff --git a/test/core/end2end/tests/max_message_length.c b/test/core/end2end/tests/max_message_length.c
index 3a927ddcbc6..b416627bfd7 100644
--- a/test/core/end2end/tests/max_message_length.c
+++ b/test/core/end2end/tests/max_message_length.c
@@ -172,9 +172,10 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
 
   cqv = cq_verifier_create(f.cq);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/service/method", "foo.test.google.fr:1234",
-                               gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/service/method",
+      get_host_override_string("foo.test.google.fr:1234", config),
+      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -247,7 +248,8 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(0 == strcmp(call_details.method, "/service/method"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
 done:
diff --git a/test/core/end2end/tests/negative_deadline.c b/test/core/end2end/tests/negative_deadline.c
index c999ac116aa..929777d39ef 100644
--- a/test/core/end2end/tests/negative_deadline.c
+++ b/test/core/end2end/tests/negative_deadline.c
@@ -97,7 +97,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void simple_request_body(grpc_end2end_test_fixture f, size_t num_ops) {
+static void simple_request_body(grpc_end2end_test_config config,
+                                grpc_end2end_test_fixture f, size_t num_ops) {
   grpc_call *c;
   gpr_timespec deadline = gpr_inf_past(GPR_CLOCK_REALTIME);
   cq_verifier *cqv = cq_verifier_create(f.cq);
@@ -112,9 +113,10 @@ static void simple_request_body(grpc_end2end_test_fixture f, size_t num_ops) {
 
   gpr_log(GPR_DEBUG, "test with %" PRIuPTR " ops", num_ops);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -167,7 +169,7 @@ static void test_invoke_simple_request(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
 
   f = begin_test(config, "test_invoke_simple_request", NULL, NULL);
-  simple_request_body(f, num_ops);
+  simple_request_body(config, f, num_ops);
   end_test(&f);
   config.tear_down_data(&f);
 }
diff --git a/test/core/end2end/tests/network_status_change.c b/test/core/end2end/tests/network_status_change.c
index fe9c45f273d..96e909e4635 100644
--- a/test/core/end2end/tests/network_status_change.c
+++ b/test/core/end2end/tests/network_status_change.c
@@ -122,8 +122,10 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -212,7 +214,8 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
   // Expected behavior of a RPC when network is lost.
   GPR_ASSERT(status == GRPC_STATUS_UNAVAILABLE);
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
 
   gpr_free(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
diff --git a/test/core/end2end/tests/no_logging.c b/test/core/end2end/tests/no_logging.c
index 1d3cfda6e50..54614cb0291 100644
--- a/test/core/end2end/tests/no_logging.c
+++ b/test/core/end2end/tests/no_logging.c
@@ -125,7 +125,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void simple_request_body(grpc_end2end_test_fixture f) {
+static void simple_request_body(grpc_end2end_test_config config,
+                                grpc_end2end_test_fixture f) {
   grpc_call *c;
   grpc_call *s;
   gpr_timespec deadline = five_seconds_time();
@@ -143,9 +144,10 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   int was_cancelled = 2;
   char *peer;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   peer = grpc_call_get_peer(c);
@@ -227,7 +229,8 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(0 == call_details.flags);
   GPR_ASSERT(was_cancelled == 1);
 
@@ -248,7 +251,7 @@ static void test_invoke_simple_request(grpc_end2end_test_config config) {
 
   f = begin_test(config, "test_invoke_simple_request_with_no_error_logging",
                  NULL, NULL);
-  simple_request_body(f);
+  simple_request_body(config, f);
   end_test(&f);
   config.tear_down_data(&f);
 }
@@ -259,10 +262,10 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config) {
       begin_test(config, "test_invoke_10_simple_requests_with_no_error_logging",
                  NULL, NULL);
   for (i = 0; i < 10; i++) {
-    simple_request_body(f);
+    simple_request_body(config, f);
     gpr_log(GPR_INFO, "Passed simple request %d", i);
   }
-  simple_request_body(f);
+  simple_request_body(config, f);
   end_test(&f);
   config.tear_down_data(&f);
 }
@@ -283,10 +286,10 @@ static void test_no_logging_in_one_request(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f =
       begin_test(config, "test_no_logging_in_last_request", NULL, NULL);
   for (i = 0; i < 10; i++) {
-    simple_request_body(f);
+    simple_request_body(config, f);
   }
   gpr_atm_no_barrier_store(&g_log_func, (gpr_atm)test_no_log);
-  simple_request_body(f);
+  simple_request_body(config, f);
   gpr_atm_no_barrier_store(&g_log_func, (gpr_atm)gpr_default_log);
   end_test(&f);
   config.tear_down_data(&f);
diff --git a/test/core/end2end/tests/payload.c b/test/core/end2end/tests/payload.c
index 40696d088f1..17cea48f037 100644
--- a/test/core/end2end/tests/payload.c
+++ b/test/core/end2end/tests/payload.c
@@ -111,7 +111,8 @@ static gpr_slice generate_random_slice() {
   return out;
 }
 
-static void request_response_with_payload(grpc_end2end_test_fixture f) {
+static void request_response_with_payload(grpc_end2end_test_config config,
+                                          grpc_end2end_test_fixture f) {
   /* Create large request and response bodies. These are big enough to require
    * multiple round trips to deliver to the peer, and their exact contents of
    * will be verified on completion. */
@@ -140,8 +141,10 @@ static void request_response_with_payload(grpc_end2end_test_fixture f) {
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -240,7 +243,8 @@ static void request_response_with_payload(grpc_end2end_test_fixture f) {
   GPR_ASSERT(status == GRPC_STATUS_OK);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 0);
   GPR_ASSERT(byte_buffer_eq_slice(request_payload_recv, request_payload_slice));
   GPR_ASSERT(
@@ -269,7 +273,7 @@ static void test_invoke_request_response_with_payload(
     grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f = begin_test(
       config, "test_invoke_request_response_with_payload", NULL, NULL);
-  request_response_with_payload(f);
+  request_response_with_payload(config, f);
   end_test(&f);
   config.tear_down_data(&f);
 }
@@ -280,7 +284,7 @@ static void test_invoke_10_request_response_with_payload(
   grpc_end2end_test_fixture f = begin_test(
       config, "test_invoke_10_request_response_with_payload", NULL, NULL);
   for (i = 0; i < 10; i++) {
-    request_response_with_payload(f);
+    request_response_with_payload(config, f);
   }
   end_test(&f);
   config.tear_down_data(&f);
diff --git a/test/core/end2end/tests/ping_pong_streaming.c b/test/core/end2end/tests/ping_pong_streaming.c
index 7e360c415b1..52f0d70a443 100644
--- a/test/core/end2end/tests/ping_pong_streaming.c
+++ b/test/core/end2end/tests/ping_pong_streaming.c
@@ -123,9 +123,10 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
   gpr_slice request_payload_slice = gpr_slice_from_copied_string("hello world");
   gpr_slice response_payload_slice = gpr_slice_from_copied_string("hello you");
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
diff --git a/test/core/end2end/tests/registered_call.c b/test/core/end2end/tests/registered_call.c
index 9b2b42b5583..6594b420b9d 100644
--- a/test/core/end2end/tests/registered_call.c
+++ b/test/core/end2end/tests/registered_call.c
@@ -97,7 +97,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void simple_request_body(grpc_end2end_test_fixture f, void *rc) {
+static void simple_request_body(grpc_end2end_test_config config,
+                                grpc_end2end_test_fixture f, void *rc) {
   grpc_call *c;
   grpc_call *s;
   gpr_timespec deadline = five_seconds_time();
@@ -186,7 +187,8 @@ static void simple_request_body(grpc_end2end_test_fixture f, void *rc) {
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
@@ -204,10 +206,11 @@ static void simple_request_body(grpc_end2end_test_fixture f, void *rc) {
 static void test_invoke_simple_request(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f =
       begin_test(config, "test_invoke_simple_request", NULL, NULL);
-  void *rc = grpc_channel_register_call(f.client, "/foo",
-                                        "foo.test.google.fr:1234", NULL);
+  void *rc = grpc_channel_register_call(
+      f.client, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), NULL);
 
-  simple_request_body(f, rc);
+  simple_request_body(config, f, rc);
   end_test(&f);
   config.tear_down_data(&f);
 }
@@ -216,11 +219,12 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config) {
   int i;
   grpc_end2end_test_fixture f =
       begin_test(config, "test_invoke_10_simple_requests", NULL, NULL);
-  void *rc = grpc_channel_register_call(f.client, "/foo",
-                                        "foo.test.google.fr:1234", NULL);
+  void *rc = grpc_channel_register_call(
+      f.client, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), NULL);
 
   for (i = 0; i < 10; i++) {
-    simple_request_body(f, rc);
+    simple_request_body(config, f, rc);
     gpr_log(GPR_INFO, "Passed simple request %d", i);
   }
   end_test(&f);
diff --git a/test/core/end2end/tests/request_with_flags.c b/test/core/end2end/tests/request_with_flags.c
index 25150e6f2d6..f96ef6aa94d 100644
--- a/test/core/end2end/tests/request_with_flags.c
+++ b/test/core/end2end/tests/request_with_flags.c
@@ -120,8 +120,10 @@ static void test_invoke_request_with_flags(
   size_t details_capacity = 0;
   grpc_call_error expectation;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
diff --git a/test/core/end2end/tests/request_with_payload.c b/test/core/end2end/tests/request_with_payload.c
index 67208c050c1..359f4e9fd29 100644
--- a/test/core/end2end/tests/request_with_payload.c
+++ b/test/core/end2end/tests/request_with_payload.c
@@ -119,8 +119,10 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -208,7 +210,8 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
   GPR_ASSERT(status == GRPC_STATUS_OK);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 0);
   GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, "hello world"));
 
diff --git a/test/core/end2end/tests/server_finishes_request.c b/test/core/end2end/tests/server_finishes_request.c
index 7fb9025aa38..3bb25fd9242 100644
--- a/test/core/end2end/tests/server_finishes_request.c
+++ b/test/core/end2end/tests/server_finishes_request.c
@@ -97,7 +97,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void simple_request_body(grpc_end2end_test_fixture f) {
+static void simple_request_body(grpc_end2end_test_config config,
+                                grpc_end2end_test_fixture f) {
   grpc_call *c;
   grpc_call *s;
   gpr_timespec deadline = five_seconds_time();
@@ -114,9 +115,10 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -183,7 +185,8 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
@@ -202,7 +205,7 @@ static void test_invoke_simple_request(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f;
 
   f = begin_test(config, "test_invoke_simple_request", NULL, NULL);
-  simple_request_body(f);
+  simple_request_body(config, f);
   end_test(&f);
   config.tear_down_data(&f);
 }
diff --git a/test/core/end2end/tests/shutdown_finishes_calls.c b/test/core/end2end/tests/shutdown_finishes_calls.c
index dff2e6f2809..b80a2e35f23 100644
--- a/test/core/end2end/tests/shutdown_finishes_calls.c
+++ b/test/core/end2end/tests/shutdown_finishes_calls.c
@@ -104,8 +104,10 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -171,7 +173,8 @@ static void test_early_server_shutdown_finishes_inflight_calls(
 
   GPR_ASSERT(status == GRPC_STATUS_UNAVAILABLE);
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
diff --git a/test/core/end2end/tests/simple_cacheable_request.c b/test/core/end2end/tests/simple_cacheable_request.c
index b52eb19315e..9f6a6a08a0f 100644
--- a/test/core/end2end/tests/simple_cacheable_request.c
+++ b/test/core/end2end/tests/simple_cacheable_request.c
@@ -133,8 +133,10 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -235,7 +237,8 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   GPR_ASSERT(status == GRPC_STATUS_OK);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   if (config.feature_mask & FEATURE_MASK_SUPPORTS_REQUEST_PROXYING) {
     // Our simple proxy does not support cacheable requests
   } else {
diff --git a/test/core/end2end/tests/simple_delayed_request.c b/test/core/end2end/tests/simple_delayed_request.c
index 50d1975c8d0..ec40c8f22db 100644
--- a/test/core/end2end/tests/simple_delayed_request.c
+++ b/test/core/end2end/tests/simple_delayed_request.c
@@ -106,8 +106,10 @@ static void simple_delayed_request_body(grpc_end2end_test_config config,
 
   config.init_client(f, client_args);
 
-  c = grpc_channel_create_call(f->client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f->client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -180,7 +182,8 @@ static void simple_delayed_request_body(grpc_end2end_test_config config,
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
diff --git a/test/core/end2end/tests/simple_metadata.c b/test/core/end2end/tests/simple_metadata.c
index 13c77c033e0..7b8adb1f32a 100644
--- a/test/core/end2end/tests/simple_metadata.c
+++ b/test/core/end2end/tests/simple_metadata.c
@@ -130,8 +130,10 @@ static void test_request_response_with_metadata_and_payload(
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -232,7 +234,8 @@ static void test_request_response_with_metadata_and_payload(
   GPR_ASSERT(status == GRPC_STATUS_OK);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 0);
   GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, "hello world"));
   GPR_ASSERT(byte_buffer_eq_string(response_payload_recv, "hello you"));
diff --git a/test/core/end2end/tests/simple_request.c b/test/core/end2end/tests/simple_request.c
index ed7b850808a..2dea5d6af2e 100644
--- a/test/core/end2end/tests/simple_request.c
+++ b/test/core/end2end/tests/simple_request.c
@@ -97,7 +97,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
   grpc_completion_queue_destroy(f->cq);
 }
 
-static void simple_request_body(grpc_end2end_test_fixture f) {
+static void simple_request_body(grpc_end2end_test_config config,
+                                grpc_end2end_test_fixture f) {
   grpc_call *c;
   grpc_call *s;
   gpr_timespec deadline = five_seconds_time();
@@ -115,9 +116,10 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   int was_cancelled = 2;
   char *peer;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   peer = grpc_call_get_peer(c);
@@ -202,7 +204,8 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(0 == call_details.flags);
   GPR_ASSERT(was_cancelled == 1);
 
@@ -222,7 +225,7 @@ static void test_invoke_simple_request(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f;
 
   f = begin_test(config, "test_invoke_simple_request", NULL, NULL);
-  simple_request_body(f);
+  simple_request_body(config, f);
   end_test(&f);
   config.tear_down_data(&f);
 }
@@ -232,7 +235,7 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f =
       begin_test(config, "test_invoke_10_simple_requests", NULL, NULL);
   for (i = 0; i < 10; i++) {
-    simple_request_body(f);
+    simple_request_body(config, f);
     gpr_log(GPR_INFO, "Passed simple request %d", i);
   }
   end_test(&f);
diff --git a/test/core/end2end/tests/streaming_error_response.c b/test/core/end2end/tests/streaming_error_response.c
index 8285468321c..7b5315d667f 100644
--- a/test/core/end2end/tests/streaming_error_response.c
+++ b/test/core/end2end/tests/streaming_error_response.c
@@ -125,8 +125,10 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -245,7 +247,8 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
   GPR_ASSERT(status == GRPC_STATUS_FAILED_PRECONDITION);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(was_cancelled == 1);
 
   gpr_free(details);
diff --git a/test/core/end2end/tests/trailing_metadata.c b/test/core/end2end/tests/trailing_metadata.c
index d7093ae7239..87e29a934fb 100644
--- a/test/core/end2end/tests/trailing_metadata.c
+++ b/test/core/end2end/tests/trailing_metadata.c
@@ -133,8 +133,10 @@ static void test_request_response_with_metadata_and_payload(
   size_t details_capacity = 0;
   int was_cancelled = 2;
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
+      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -236,7 +238,8 @@ static void test_request_response_with_metadata_and_payload(
   GPR_ASSERT(status == GRPC_STATUS_OK);
   GPR_ASSERT(0 == strcmp(details, "xyz"));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
   GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, "hello world"));
   GPR_ASSERT(byte_buffer_eq_string(response_payload_recv, "hello you"));
   GPR_ASSERT(contains_metadata(&request_metadata_recv, "key1", "val1"));