diff --git a/tools/run_tests/configs.json b/tools/run_tests/configs.json
index a7cc376c2d7..b0839ef026a 100644
--- a/tools/run_tests/configs.json
+++ b/tools/run_tests/configs.json
@@ -66,7 +66,7 @@
     "environ": {
       "TSAN_OPTIONS": "suppressions=tools/tsan_suppressions.txt:halt_on_error=1:second_deadlock_stack=1"
     }, 
-    "timeout_multiplier": 8
+    "timeout_multiplier": 5
   }, 
   {
     "config": "stapprof"
diff --git a/tools/run_tests/run_tests_matrix.py b/tools/run_tests/run_tests_matrix.py
index f9313614b91..e4c51b8c031 100755
--- a/tools/run_tests/run_tests_matrix.py
+++ b/tools/run_tests/run_tests_matrix.py
@@ -42,7 +42,7 @@ os.chdir(_ROOT)
 
 # Set the timeout high to allow enough time for sanitizers and pre-building
 # clang docker.
-_RUNTESTS_TIMEOUT = 3*60*60
+_RUNTESTS_TIMEOUT = 4*60*60
 
 # Number of jobs assigned to each run_tests.py instance
 _INNER_JOBS = 2