diff --git a/build.yaml b/build.yaml
index a83ebc595ad..48693aa8417 100644
--- a/build.yaml
+++ b/build.yaml
@@ -1456,7 +1456,7 @@ targets:
   - gpr_test_util
   - gpr
 - name: fling_stream_test
-  cpu_cost: 2
+  cpu_cost: 1.5
   build: test
   language: c
   src:
@@ -1471,7 +1471,7 @@ targets:
   - linux
   - posix
 - name: fling_test
-  cpu_cost: 2
+  cpu_cost: 1.5
   build: test
   language: c
   src:
@@ -1603,7 +1603,7 @@ targets:
   - gpr_test_util
   - gpr
 - name: gpr_stack_lockfree_test
-  cpu_cost: 10
+  cpu_cost: 7
   build: test
   language: c
   src:
@@ -1620,7 +1620,7 @@ targets:
   - gpr_test_util
   - gpr
 - name: gpr_sync_test
-  cpu_cost: 10
+  cpu_cost: 3
   build: test
   language: c
   src:
@@ -1629,7 +1629,7 @@ targets:
   - gpr_test_util
   - gpr
 - name: gpr_thd_test
-  cpu_cost: 10
+  cpu_cost: 1
   build: test
   language: c
   src:
@@ -1954,6 +1954,7 @@ targets:
   - gpr_test_util
   - gpr
 - name: invalid_call_argument_test
+  cpu_cost: 0.1
   build: test
   language: c
   src:
@@ -2253,7 +2254,7 @@ targets:
   - linux
   - posix
 - name: tcp_posix_test
-  cpu_cost: 0.5
+  cpu_cost: 0.2
   build: test
   language: c
   src:
diff --git a/test/core/end2end/gen_build_yaml.py b/test/core/end2end/gen_build_yaml.py
index 3d3bec1a69e..5264f6e7163 100755
--- a/test/core/end2end/gen_build_yaml.py
+++ b/test/core/end2end/gen_build_yaml.py
@@ -118,7 +118,8 @@ END2END_TESTS = {
     'ping_pong_streaming': default_test_options,
     'ping': connectivity_test_options._replace(proxyable=False),
     'registered_call': default_test_options,
-    'request_with_flags': default_test_options._replace(proxyable=False),
+    'request_with_flags': default_test_options._replace(
+        proxyable=False, cpu_cost=LOWCPU),
     'request_with_payload': default_test_options,
     'server_finishes_request': default_test_options,
     'shutdown_finishes_calls': default_test_options,
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 86f7ea4a61c..dd743d61cd0 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -422,7 +422,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 2, 
+    "cpu_cost": 1.5, 
     "exclude_configs": [], 
     "flaky": false, 
     "gtest": false, 
@@ -441,7 +441,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 2, 
+    "cpu_cost": 1.5, 
     "exclude_configs": [], 
     "flaky": false, 
     "gtest": false, 
@@ -711,7 +711,7 @@
       "posix", 
       "windows"
     ], 
-    "cpu_cost": 10, 
+    "cpu_cost": 7, 
     "exclude_configs": [], 
     "flaky": false, 
     "gtest": false, 
@@ -753,7 +753,7 @@
       "posix", 
       "windows"
     ], 
-    "cpu_cost": 10, 
+    "cpu_cost": 3, 
     "exclude_configs": [], 
     "flaky": false, 
     "gtest": false, 
@@ -774,7 +774,7 @@
       "posix", 
       "windows"
     ], 
-    "cpu_cost": 10, 
+    "cpu_cost": 1, 
     "exclude_configs": [], 
     "flaky": false, 
     "gtest": false, 
@@ -1226,7 +1226,7 @@
       "posix", 
       "windows"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "gtest": false, 
@@ -1662,7 +1662,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.5, 
+    "cpu_cost": 0.2, 
     "exclude_configs": [], 
     "flaky": false, 
     "gtest": false, 
@@ -4999,7 +4999,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -5835,7 +5835,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -6641,7 +6641,7 @@
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -7330,7 +7330,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -8129,7 +8129,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -8788,7 +8788,7 @@
     "ci_platforms": [
       "linux"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -9551,7 +9551,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -10387,7 +10387,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -11193,7 +11193,7 @@
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -12579,7 +12579,7 @@
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -13251,7 +13251,7 @@
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -13944,7 +13944,7 @@
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -14751,7 +14751,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -15587,7 +15587,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -17016,7 +17016,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -17813,7 +17813,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -18627,7 +18627,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -19304,7 +19304,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -20081,7 +20081,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -20724,7 +20724,7 @@
     "ci_platforms": [
       "linux"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -21465,7 +21465,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -22279,7 +22279,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -23631,7 +23631,7 @@
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -24282,7 +24282,7 @@
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -25002,7 +25002,7 @@
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [
       "msan"
     ], 
@@ -25726,7 +25726,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c",