diff --git a/tools/internal_ci/windows/grpc_basictests_python.cfg b/tools/internal_ci/windows/grpc_basictests_python.cfg
index 09137a9df55..979f263d2de 100644
--- a/tools/internal_ci/windows/grpc_basictests_python.cfg
+++ b/tools/internal_ci/windows/grpc_basictests_python.cfg
@@ -16,7 +16,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/windows/grpc_run_tests_matrix.bat"
-timeout_mins: 180
+timeout_mins: 240
 action {
   define_artifacts {
     regex: "**/*sponge_log.*"
diff --git a/tools/internal_ci/windows/pull_request/grpc_basictests_python.cfg b/tools/internal_ci/windows/pull_request/grpc_basictests_python.cfg
index ab541436b40..c1cf2be234e 100644
--- a/tools/internal_ci/windows/pull_request/grpc_basictests_python.cfg
+++ b/tools/internal_ci/windows/pull_request/grpc_basictests_python.cfg
@@ -16,7 +16,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/windows/grpc_run_tests_matrix.bat"
-timeout_mins: 90
+timeout_mins: 180
 action {
   define_artifacts {
     regex: "**/*sponge_log.*"