diff --git a/test/core/end2end/tests/binary_metadata.c b/test/core/end2end/tests/binary_metadata.c
index 357b182fcae..f2038d7cbcf 100644
--- a/test/core/end2end/tests/binary_metadata.c
+++ b/test/core/end2end/tests/binary_metadata.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -149,7 +147,7 @@ static void test_request_response_with_metadata_and_payload(
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -290,7 +288,6 @@ static void test_request_response_with_metadata_and_payload(
 }
 
 void binary_metadata(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_request_response_with_metadata_and_payload(config);
 }
 
diff --git a/test/core/end2end/tests/call_creds.c b/test/core/end2end/tests/call_creds.c
index ae3c3e7795c..027c5fdfd5c 100644
--- a/test/core/end2end/tests/call_creds.c
+++ b/test/core/end2end/tests/call_creds.c
@@ -51,8 +51,6 @@ static const char iam_selector[] = "selector";
 static const char overridden_iam_token[] = "overridden_token";
 static const char overridden_iam_selector[] = "overridden_selector";
 
-static const char *authority;
-
 typedef enum { NONE, OVERRIDE, DESTROY } override_mode;
 
 static void *tag(intptr_t t) { return (void *)t; }
@@ -167,7 +165,7 @@ static void request_response_with_payload_and_call_creds(
   cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/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);
@@ -402,7 +400,7 @@ static void test_request_with_server_rejecting_client_creds(
   cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/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);
@@ -475,7 +473,6 @@ static void test_request_with_server_rejecting_client_creds(
 
 void call_creds(grpc_end2end_test_config config) {
   if (config.feature_mask & FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS) {
-    authority = get_host_override_string("foo.test.google.fr", config);
     test_request_response_with_payload_and_call_creds(config);
     test_request_response_with_payload_and_overridden_call_creds(config);
     test_request_response_with_payload_and_deleted_call_creds(config);
diff --git a/test/core/end2end/tests/cancel_after_accept.c b/test/core/end2end/tests/cancel_after_accept.c
index 238e603633b..010ad088129 100644
--- a/test/core/end2end/tests/cancel_after_accept.c
+++ b/test/core/end2end/tests/cancel_after_accept.c
@@ -44,8 +44,6 @@
 #include "test/core/end2end/cq_verifier.h"
 #include "test/core/end2end/tests/cancel_test_helpers.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -128,7 +126,7 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -231,7 +229,6 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
 void cancel_after_accept(grpc_end2end_test_config config) {
   unsigned i;
 
-  authority = get_host_override_string("foo.test.google.fr", config);
   for (i = 0; i < GPR_ARRAY_SIZE(cancellation_modes); i++) {
     test_cancel_after_accept(config, cancellation_modes[i]);
   }
diff --git a/test/core/end2end/tests/cancel_after_client_done.c b/test/core/end2end/tests/cancel_after_client_done.c
index 91b2589441b..7644658b199 100644
--- a/test/core/end2end/tests/cancel_after_client_done.c
+++ b/test/core/end2end/tests/cancel_after_client_done.c
@@ -44,8 +44,6 @@
 #include "test/core/end2end/cq_verifier.h"
 #include "test/core/end2end/tests/cancel_test_helpers.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -128,7 +126,7 @@ static void test_cancel_after_accept_and_writes_closed(
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/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 +233,6 @@ static void test_cancel_after_accept_and_writes_closed(
 void cancel_after_client_done(grpc_end2end_test_config config) {
   unsigned i;
 
-  authority = get_host_override_string("foo.test.google.fr", config);
   for (i = 0; i < GPR_ARRAY_SIZE(cancellation_modes); i++) {
     test_cancel_after_accept_and_writes_closed(config, cancellation_modes[i]);
   }
diff --git a/test/core/end2end/tests/cancel_after_invoke.c b/test/core/end2end/tests/cancel_after_invoke.c
index b10a8756d4c..1628f0d5602 100644
--- a/test/core/end2end/tests/cancel_after_invoke.c
+++ b/test/core/end2end/tests/cancel_after_invoke.c
@@ -44,8 +44,6 @@
 #include "test/core/end2end/cq_verifier.h"
 #include "test/core/end2end/tests/cancel_test_helpers.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -123,7 +121,7 @@ static void test_cancel_after_invoke(grpc_end2end_test_config config,
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -194,7 +192,6 @@ static void test_cancel_after_invoke(grpc_end2end_test_config config,
 void cancel_after_invoke(grpc_end2end_test_config config) {
   unsigned i, j;
 
-  authority = get_host_override_string("foo.test.google.fr", config);
   for (j = 2; j < 6; j++) {
     for (i = 0; i < GPR_ARRAY_SIZE(cancellation_modes); i++) {
       test_cancel_after_invoke(config, cancellation_modes[i], j);
diff --git a/test/core/end2end/tests/cancel_before_invoke.c b/test/core/end2end/tests/cancel_before_invoke.c
index e97ddd63cac..7e1d4ca1fb1 100644
--- a/test/core/end2end/tests/cancel_before_invoke.c
+++ b/test/core/end2end/tests/cancel_before_invoke.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -121,7 +119,7 @@ static void test_cancel_before_invoke(grpc_end2end_test_config config,
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/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));
@@ -191,7 +189,6 @@ static void test_cancel_before_invoke(grpc_end2end_test_config config,
 
 void cancel_before_invoke(grpc_end2end_test_config config) {
   size_t i;
-  authority = get_host_override_string("foo.test.google.fr", config);
   for (i = 1; i <= 6; i++) {
     test_cancel_before_invoke(config, i);
   }
diff --git a/test/core/end2end/tests/cancel_in_a_vacuum.c b/test/core/end2end/tests/cancel_in_a_vacuum.c
index f78d4cc891a..780d693ac55 100644
--- a/test/core/end2end/tests/cancel_in_a_vacuum.c
+++ b/test/core/end2end/tests/cancel_in_a_vacuum.c
@@ -44,8 +44,6 @@
 #include "test/core/end2end/cq_verifier.h"
 #include "test/core/end2end/tests/cancel_test_helpers.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -108,7 +106,7 @@ static void test_cancel_in_a_vacuum(grpc_end2end_test_config config,
   cq_verifier *v_client = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/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));
@@ -123,7 +121,6 @@ static void test_cancel_in_a_vacuum(grpc_end2end_test_config config,
 void cancel_in_a_vacuum(grpc_end2end_test_config config) {
   unsigned i;
 
-  authority = get_host_override_string("foo.test.google.fr", config);
   for (i = 0; i < GPR_ARRAY_SIZE(cancellation_modes); i++) {
     test_cancel_in_a_vacuum(config, cancellation_modes[i]);
   }
diff --git a/test/core/end2end/tests/cancel_with_status.c b/test/core/end2end/tests/cancel_with_status.c
index ebd7cb216fa..15de1eaaf75 100644
--- a/test/core/end2end/tests/cancel_with_status.c
+++ b/test/core/end2end/tests/cancel_with_status.c
@@ -45,8 +45,6 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -99,7 +97,7 @@ 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);
@@ -115,7 +113,7 @@ 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", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -171,14 +169,13 @@ 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);
 }
 
 void cancel_with_status(grpc_end2end_test_config config) {
   size_t i;
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   for (i = 1; i <= 4; i++) {
     test_invoke_simple_request(config, i);
   }
diff --git a/test/core/end2end/tests/compressed_payload.c b/test/core/end2end/tests/compressed_payload.c
index 4607940e6c3..5925ce7b81a 100644
--- a/test/core/end2end/tests/compressed_payload.c
+++ b/test/core/end2end/tests/compressed_payload.c
@@ -50,8 +50,6 @@
 #include "src/core/lib/surface/call_test_only.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -149,7 +147,7 @@ static void request_for_disabled_algorithm(
   cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -323,7 +321,7 @@ static void request_with_payload_template(
   cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -600,7 +598,6 @@ static void test_invoke_request_with_disabled_algorithm(
 }
 
 void compressed_payload(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_invoke_request_with_exceptionally_uncompressed_payload(config);
   test_invoke_request_with_uncompressed_payload(config);
   test_invoke_request_with_compressed_payload(config);
diff --git a/test/core/end2end/tests/disappearing_server.c b/test/core/end2end/tests/disappearing_server.c
index a934a9e5fe1..6b32b36d2ca 100644
--- a/test/core/end2end/tests/disappearing_server.c
+++ b/test/core/end2end/tests/disappearing_server.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static gpr_timespec n_seconds_time(int n) {
@@ -81,7 +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;
@@ -99,7 +98,7 @@ static void do_request_and_shutdown_server(grpc_end2end_test_fixture *f,
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f->client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -199,12 +198,12 @@ 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);
 
@@ -213,7 +212,6 @@ static void disappearing_server_test(grpc_end2end_test_config config) {
 }
 
 void disappearing_server(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   GPR_ASSERT(config.feature_mask & FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION);
   disappearing_server_test(config);
 }
diff --git a/test/core/end2end/tests/empty_batch.c b/test/core/end2end/tests/empty_batch.c
index 146f83b0808..580cbac67d4 100644
--- a/test/core/end2end/tests/empty_batch.c
+++ b/test/core/end2end/tests/empty_batch.c
@@ -45,8 +45,6 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -99,7 +97,8 @@ 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);
@@ -107,7 +106,7 @@ static void empty_batch_body(grpc_end2end_test_fixture f) {
   grpc_op *op = NULL;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/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);
@@ -124,13 +123,12 @@ 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);
 }
 
 void empty_batch(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_invoke_empty_body(config);
 }
 
diff --git a/test/core/end2end/tests/filter_call_init_fails.c b/test/core/end2end/tests/filter_call_init_fails.c
index 892e92e7642..4255e758147 100644
--- a/test/core/end2end/tests/filter_call_init_fails.c
+++ b/test/core/end2end/tests/filter_call_init_fails.c
@@ -49,8 +49,6 @@
 
 enum { TIMEOUT = 200000 };
 
-static const char *authority;
-
 static bool g_enable_filter = false;
 
 static void *tag(intptr_t t) { return (void *)t; }
@@ -130,7 +128,7 @@ static void test_request(grpc_end2end_test_config config) {
   size_t details_capacity = 0;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -265,7 +263,6 @@ static void init_plugin(void) {
 static void destroy_plugin(void) {}
 
 void filter_call_init_fails(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   g_enable_filter = true;
   test_request(config);
   g_enable_filter = false;
diff --git a/test/core/end2end/tests/filter_causes_close.c b/test/core/end2end/tests/filter_causes_close.c
index 163dbf87f0c..210c464cf11 100644
--- a/test/core/end2end/tests/filter_causes_close.c
+++ b/test/core/end2end/tests/filter_causes_close.c
@@ -46,8 +46,6 @@
 #include "src/core/lib/surface/channel_init.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static bool g_enable_filter = false;
 
 static void *tag(intptr_t t) { return (void *)t; }
@@ -126,7 +124,7 @@ static void test_request(grpc_end2end_test_config config) {
   size_t details_capacity = 0;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -284,7 +282,6 @@ static void init_plugin(void) {
 static void destroy_plugin(void) {}
 
 void filter_causes_close(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   g_enable_filter = true;
   test_request(config);
   g_enable_filter = false;
diff --git a/test/core/end2end/tests/graceful_server_shutdown.c b/test/core/end2end/tests/graceful_server_shutdown.c
index 5204c90b277..45892b8824f 100644
--- a/test/core/end2end/tests/graceful_server_shutdown.c
+++ b/test/core/end2end/tests/graceful_server_shutdown.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -114,7 +112,7 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/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 +210,6 @@ static void test_early_server_shutdown_finishes_inflight_calls(
 }
 
 void graceful_server_shutdown(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_early_server_shutdown_finishes_inflight_calls(config);
 }
 
diff --git a/test/core/end2end/tests/high_initial_seqno.c b/test/core/end2end/tests/high_initial_seqno.c
index b9cfbd8b715..96d58d47877 100644
--- a/test/core/end2end/tests/high_initial_seqno.c
+++ b/test/core/end2end/tests/high_initial_seqno.c
@@ -47,8 +47,6 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -101,7 +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();
@@ -119,7 +118,7 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/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 +231,7 @@ 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);
@@ -241,7 +240,6 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config,
 }
 
 void high_initial_seqno(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   test_invoke_10_simple_requests(config, 16777213);
   if (config.feature_mask & FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION) {
     test_invoke_10_simple_requests(config, 2147483645);
diff --git a/test/core/end2end/tests/hpack_size.c b/test/core/end2end/tests/hpack_size.c
index 5b23d6b1e73..c400134e1fe 100644
--- a/test/core/end2end/tests/hpack_size.c
+++ b/test/core/end2end/tests/hpack_size.c
@@ -47,8 +47,6 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 const char *hobbits[][2] = {
@@ -241,7 +239,7 @@ 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();
@@ -271,7 +269,7 @@ static void simple_request_body(grpc_end2end_test_fixture f, size_t index) {
   extra_metadata[2].value_length = strlen(extra_metadata[2].value);
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -386,7 +384,7 @@ 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);
@@ -398,7 +396,6 @@ void hpack_size(grpc_end2end_test_config config) {
                                           1000, 32768, 4 * 1024 * 1024};
   size_t i, j;
 
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   for (i = 0; i < GPR_ARRAY_SIZE(interesting_sizes); i++) {
     for (j = 0; j < GPR_ARRAY_SIZE(interesting_sizes); j++) {
       test_size(config, interesting_sizes[i], interesting_sizes[j]);
diff --git a/test/core/end2end/tests/idempotent_request.c b/test/core/end2end/tests/idempotent_request.c
index 5b02e4410a3..bbde35b5df6 100644
--- a/test/core/end2end/tests/idempotent_request.c
+++ b/test/core/end2end/tests/idempotent_request.c
@@ -45,8 +45,6 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -99,7 +97,7 @@ 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();
@@ -118,7 +116,7 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   char *peer;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   peer = grpc_call_get_peer(c);
@@ -225,7 +223,7 @@ 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);
 }
@@ -235,7 +233,7 @@ 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);
@@ -244,7 +242,6 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config) {
 
 void idempotent_request(grpc_end2end_test_config config) {
   int i;
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   for (i = 0; i < 10; i++) {
     test_invoke_simple_request(config);
   }
diff --git a/test/core/end2end/tests/invoke_large_request.c b/test/core/end2end/tests/invoke_large_request.c
index c55bac48301..67dc2c8f0a4 100644
--- a/test/core/end2end/tests/invoke_large_request.c
+++ b/test/core/end2end/tests/invoke_large_request.c
@@ -44,8 +44,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -147,7 +145,7 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -274,7 +272,6 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
 }
 
 void invoke_large_request(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_invoke_large_request(config, 16384, 65536);
   test_invoke_large_request(config, 32768, 65536);
 
diff --git a/test/core/end2end/tests/large_metadata.c b/test/core/end2end/tests/large_metadata.c
index b19b6f8b800..618e8497702 100644
--- a/test/core/end2end/tests/large_metadata.c
+++ b/test/core/end2end/tests/large_metadata.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -128,7 +126,7 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   meta.key = "key";
@@ -257,7 +255,6 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
 }
 
 void large_metadata(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_request_with_large_metadata(config);
 }
 
diff --git a/test/core/end2end/tests/load_reporting_hook.c b/test/core/end2end/tests/load_reporting_hook.c
index 1f353ce7c91..652eedf7179 100644
--- a/test/core/end2end/tests/load_reporting_hook.c
+++ b/test/core/end2end/tests/load_reporting_hook.c
@@ -48,8 +48,6 @@
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/transport/static_metadata.h"
 
-static const char *authority;
-
 enum { TIMEOUT = 200000 };
 
 static void *tag(intptr_t t) { return (void *)t; }
@@ -123,7 +121,8 @@ 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,
+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,
@@ -154,7 +153,7 @@ static void request_response_with_payload(grpc_end2end_test_fixture f,
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               method_name, authority, deadline, NULL);
+                               method_name, get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -308,15 +307,13 @@ 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);
 }
 
 void load_reporting_hook(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_load_reporting_hook(config);
 }
 
diff --git a/test/core/end2end/tests/max_concurrent_streams.c b/test/core/end2end/tests/max_concurrent_streams.c
index 707be0950af..78c0237a66c 100644
--- a/test/core/end2end/tests/max_concurrent_streams.c
+++ b/test/core/end2end/tests/max_concurrent_streams.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -97,7 +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();
@@ -115,7 +114,7 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -253,18 +252,18 @@ 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", authority, deadline, NULL);
+                                "/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", authority, deadline, NULL);
+                                "/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(
@@ -441,7 +440,6 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
 }
 
 void max_concurrent_streams(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   test_max_concurrent_streams(config);
 }
 
diff --git a/test/core/end2end/tests/max_message_length.c b/test/core/end2end/tests/max_message_length.c
index 62e4cb35db8..c98f52fed87 100644
--- a/test/core/end2end/tests/max_message_length.c
+++ b/test/core/end2end/tests/max_message_length.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -143,7 +141,7 @@ 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,
-                               "/foo", authority,
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config),
                                gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
   GPR_ASSERT(c);
 
@@ -397,7 +395,6 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
 }
 
 void max_message_length(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   test_max_message_length_on_request(config, false /* send_limit */);
   test_max_message_length_on_request(config, true /* send_limit */);
   test_max_message_length_on_response(config, false /* send_limit */);
diff --git a/test/core/end2end/tests/negative_deadline.c b/test/core/end2end/tests/negative_deadline.c
index a715c434bd9..62490608fb2 100644
--- a/test/core/end2end/tests/negative_deadline.c
+++ b/test/core/end2end/tests/negative_deadline.c
@@ -45,8 +45,6 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -99,7 +97,7 @@ 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);
@@ -115,7 +113,7 @@ 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", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -168,14 +166,13 @@ 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);
 }
 
 void negative_deadline(grpc_end2end_test_config config) {
   size_t i;
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   for (i = 1; i <= 4; i++) {
     test_invoke_simple_request(config, i);
   }
diff --git a/test/core/end2end/tests/network_status_change.c b/test/core/end2end/tests/network_status_change.c
index b55bebbf0f3..bf02e6a9fc5 100644
--- a/test/core/end2end/tests/network_status_change.c
+++ b/test/core/end2end/tests/network_status_change.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 /* this is a private API but exposed here for testing*/
 extern void grpc_network_status_shutdown_all_endpoints();
 
@@ -125,7 +123,7 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -238,7 +236,6 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
 }
 
 void network_status_change(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_invoke_network_status_change(config);
 }
 
diff --git a/test/core/end2end/tests/no_logging.c b/test/core/end2end/tests/no_logging.c
index e299abe5997..99f2b466867 100644
--- a/test/core/end2end/tests/no_logging.c
+++ b/test/core/end2end/tests/no_logging.c
@@ -47,8 +47,6 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 enum { TIMEOUT = 200000 };
 
 static void *tag(intptr_t t) { return (void *)t; }
@@ -127,7 +125,7 @@ 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();
@@ -146,7 +144,7 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   char *peer;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   peer = grpc_call_get_peer(c);
@@ -251,7 +249,7 @@ 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);
 }
@@ -262,10 +260,10 @@ 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);
 }
@@ -286,17 +284,16 @@ 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);
 }
 
 void no_logging(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   gpr_set_log_function(log_dispatcher_func);
   test_no_logging_in_one_request(config);
   test_no_error_logging_in_entire_process(config);
diff --git a/test/core/end2end/tests/payload.c b/test/core/end2end/tests/payload.c
index 9d593617edf..96a565db5a1 100644
--- a/test/core/end2end/tests/payload.c
+++ b/test/core/end2end/tests/payload.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -97,7 +95,7 @@ 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) {
+static void request_response_with_payload(grpc_end2end_test_config config, grpc_end2end_test_fixture f) {
   gpr_slice request_payload_slice = gpr_slice_from_copied_string("hello world");
   gpr_slice response_payload_slice = gpr_slice_from_copied_string("hello you");
   grpc_call *c;
@@ -123,7 +121,7 @@ static void request_response_with_payload(grpc_end2end_test_fixture f) {
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -252,7 +250,7 @@ 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);
 }
@@ -263,14 +261,13 @@ 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);
 }
 
 void payload(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_invoke_request_response_with_payload(config);
   test_invoke_10_request_response_with_payload(config);
 }
diff --git a/test/core/end2end/tests/ping_pong_streaming.c b/test/core/end2end/tests/ping_pong_streaming.c
index f53a2888905..a33ce5f8621 100644
--- a/test/core/end2end/tests/ping_pong_streaming.c
+++ b/test/core/end2end/tests/ping_pong_streaming.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -126,7 +124,7 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
   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", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -277,7 +275,6 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
 void ping_pong_streaming(grpc_end2end_test_config config) {
   int i;
 
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   for (i = 1; i < 10; i++) {
     test_pingpong_streaming(config, i);
   }
diff --git a/test/core/end2end/tests/registered_call.c b/test/core/end2end/tests/registered_call.c
index fd1557a5d90..05582f96826 100644
--- a/test/core/end2end/tests/registered_call.c
+++ b/test/core/end2end/tests/registered_call.c
@@ -45,8 +45,6 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -208,7 +206,7 @@ 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", authority, 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);
   end_test(&f);
@@ -219,7 +217,7 @@ 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", authority, 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);
@@ -230,7 +228,6 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config) {
 }
 
 void registered_call(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   test_invoke_simple_request(config);
   test_invoke_10_simple_requests(config);
 }
diff --git a/test/core/end2end/tests/request_with_flags.c b/test/core/end2end/tests/request_with_flags.c
index 1ef0dbeb3fd..c8489fb8c77 100644
--- a/test/core/end2end/tests/request_with_flags.c
+++ b/test/core/end2end/tests/request_with_flags.c
@@ -44,8 +44,6 @@
 #include "src/core/lib/transport/byte_stream.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -123,7 +121,7 @@ static void test_invoke_request_with_flags(
   grpc_call_error expectation;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -188,7 +186,6 @@ static void test_invoke_request_with_flags(
 
 void request_with_flags(grpc_end2end_test_config config) {
   size_t i;
-  authority = get_host_override_string("foo.test.google.fr", config);
   uint32_t flags_for_op[GRPC_OP_RECV_CLOSE_ON_SERVER + 1];
 
   {
diff --git a/test/core/end2end/tests/request_with_payload.c b/test/core/end2end/tests/request_with_payload.c
index 9cbe9869f89..5755d20fe5b 100644
--- a/test/core/end2end/tests/request_with_payload.c
+++ b/test/core/end2end/tests/request_with_payload.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -122,7 +120,7 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/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 +233,6 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
 }
 
 void request_with_payload(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_invoke_request_with_payload(config);
 }
 
diff --git a/test/core/end2end/tests/server_finishes_request.c b/test/core/end2end/tests/server_finishes_request.c
index a85e9d425b7..313b0c3324f 100644
--- a/test/core/end2end/tests/server_finishes_request.c
+++ b/test/core/end2end/tests/server_finishes_request.c
@@ -45,8 +45,6 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -99,7 +97,7 @@ 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();
@@ -117,7 +115,7 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -205,13 +203,12 @@ 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);
 }
 
 void server_finishes_request(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   test_invoke_simple_request(config);
 }
 
diff --git a/test/core/end2end/tests/shutdown_finishes_calls.c b/test/core/end2end/tests/shutdown_finishes_calls.c
index 62fe068fa9e..26d61f2dcfd 100644
--- a/test/core/end2end/tests/shutdown_finishes_calls.c
+++ b/test/core/end2end/tests/shutdown_finishes_calls.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -107,7 +105,7 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -194,7 +192,6 @@ static void test_early_server_shutdown_finishes_inflight_calls(
 }
 
 void shutdown_finishes_calls(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_early_server_shutdown_finishes_inflight_calls(config);
 }
 
diff --git a/test/core/end2end/tests/simple_cacheable_request.c b/test/core/end2end/tests/simple_cacheable_request.c
index c1fef2768c7..166ee638b9b 100644
--- a/test/core/end2end/tests/simple_cacheable_request.c
+++ b/test/core/end2end/tests/simple_cacheable_request.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 enum { TIMEOUT = 200000 };
 
 static void *tag(intptr_t t) { return (void *)t; }
@@ -136,7 +134,7 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -274,7 +272,6 @@ static void test_cacheable_request_response_with_metadata_and_payload(
 }
 
 void simple_cacheable_request(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_cacheable_request_response_with_metadata_and_payload(config);
 }
 
diff --git a/test/core/end2end/tests/simple_delayed_request.c b/test/core/end2end/tests/simple_delayed_request.c
index b76a53eb68f..b19c7986082 100644
--- a/test/core/end2end/tests/simple_delayed_request.c
+++ b/test/core/end2end/tests/simple_delayed_request.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static gpr_timespec n_seconds_time(int n) {
@@ -109,7 +107,7 @@ 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", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -221,7 +219,6 @@ static void test_simple_delayed_request_long(grpc_end2end_test_config config) {
 }
 
 void simple_delayed_request(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   GPR_ASSERT(config.feature_mask & FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION);
   test_simple_delayed_request_short(config);
   test_simple_delayed_request_long(config);
diff --git a/test/core/end2end/tests/simple_metadata.c b/test/core/end2end/tests/simple_metadata.c
index ede19b6a146..c8370b4b150 100644
--- a/test/core/end2end/tests/simple_metadata.c
+++ b/test/core/end2end/tests/simple_metadata.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -133,7 +131,7 @@ static void test_request_response_with_metadata_and_payload(
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -266,7 +264,6 @@ static void test_request_response_with_metadata_and_payload(
 }
 
 void simple_metadata(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_request_response_with_metadata_and_payload(config);
 }
 
diff --git a/test/core/end2end/tests/simple_request.c b/test/core/end2end/tests/simple_request.c
index bdda097878e..a87a455a8da 100644
--- a/test/core/end2end/tests/simple_request.c
+++ b/test/core/end2end/tests/simple_request.c
@@ -45,8 +45,6 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -99,7 +97,7 @@ 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();
@@ -118,7 +116,7 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   char *peer;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   peer = grpc_call_get_peer(c);
@@ -225,7 +223,7 @@ 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);
 }
@@ -235,7 +233,7 @@ 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);
@@ -244,7 +242,6 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config) {
 
 void simple_request(grpc_end2end_test_config config) {
   int i;
-  authority = get_host_override_string("foo.test.google.fr:1234", config);
   for (i = 0; i < 10; i++) {
     test_invoke_simple_request(config);
   }
diff --git a/test/core/end2end/tests/streaming_error_response.c b/test/core/end2end/tests/streaming_error_response.c
index 2eaa4a4d1bd..b6167aa135c 100644
--- a/test/core/end2end/tests/streaming_error_response.c
+++ b/test/core/end2end/tests/streaming_error_response.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -128,7 +126,7 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -273,7 +271,6 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
 }
 
 void streaming_error_response(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test(config, false);
   test(config, true);
 }
diff --git a/test/core/end2end/tests/trailing_metadata.c b/test/core/end2end/tests/trailing_metadata.c
index 892a4247778..39a90d17e19 100644
--- a/test/core/end2end/tests/trailing_metadata.c
+++ b/test/core/end2end/tests/trailing_metadata.c
@@ -43,8 +43,6 @@
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"
 
-static const char *authority;
-
 static void *tag(intptr_t t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
@@ -136,7 +134,7 @@ static void test_request_response_with_metadata_and_payload(
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", authority, deadline, NULL);
+                               "/foo", get_host_override_string("foo.test.google.fr:1234", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -271,7 +269,6 @@ static void test_request_response_with_metadata_and_payload(
 }
 
 void trailing_metadata(grpc_end2end_test_config config) {
-  authority = get_host_override_string("foo.test.google.fr", config);
   test_request_response_with_metadata_and_payload(config);
 }