diff --git a/tools/internal_ci/linux/grpc_bazel_on_foundry_dbg.sh b/tools/internal_ci/linux/grpc_bazel_on_foundry_dbg.sh
index 3ff569df470..ed5caa40230 100644
--- a/tools/internal_ci/linux/grpc_bazel_on_foundry_dbg.sh
+++ b/tools/internal_ci/linux/grpc_bazel_on_foundry_dbg.sh
@@ -13,6 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-EXTRA_FLAGS="-c dbg --test_timeout=300,450,1200,3600"
+EXTRA_FLAGS="-c dbg --test_timeout=300,450,1200,3600 --runs_per_test_detects_flakes --runs_per_test=2"
 github/grpc/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh "${EXTRA_FLAGS}"
 
diff --git a/tools/internal_ci/linux/grpc_bazel_on_foundry_opt.sh b/tools/internal_ci/linux/grpc_bazel_on_foundry_opt.sh
index ded0d368a5c..66f02a82ff9 100644
--- a/tools/internal_ci/linux/grpc_bazel_on_foundry_opt.sh
+++ b/tools/internal_ci/linux/grpc_bazel_on_foundry_opt.sh
@@ -13,5 +13,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-EXTRA_FLAGS="-c opt --test_timeout=300,450,1200,3600"
+EXTRA_FLAGS="-c opt --test_timeout=300,450,1200,3600 --runs_per_test_detects_flakes --runs_per_test=2"
 github/grpc/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh "${EXTRA_FLAGS}"
diff --git a/tools/internal_ci/linux/pull_request/grpc_bazel_on_foundry_dbg.sh b/tools/internal_ci/linux/pull_request/grpc_bazel_on_foundry_dbg.sh
new file mode 100644
index 00000000000..3ff569df470
--- /dev/null
+++ b/tools/internal_ci/linux/pull_request/grpc_bazel_on_foundry_dbg.sh
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+EXTRA_FLAGS="-c dbg --test_timeout=300,450,1200,3600"
+github/grpc/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh "${EXTRA_FLAGS}"
+
diff --git a/tools/internal_ci/linux/pull_request/grpc_bazel_on_foundry_opt.sh b/tools/internal_ci/linux/pull_request/grpc_bazel_on_foundry_opt.sh
new file mode 100644
index 00000000000..ded0d368a5c
--- /dev/null
+++ b/tools/internal_ci/linux/pull_request/grpc_bazel_on_foundry_opt.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+EXTRA_FLAGS="-c opt --test_timeout=300,450,1200,3600"
+github/grpc/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh "${EXTRA_FLAGS}"