diff --git a/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh b/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh
index 3d4d90317c0..8b427793664 100755
--- a/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh
+++ b/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh
@@ -34,6 +34,8 @@ cd $(dirname $0)/../../..
 
 source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 
+export KOKORO_FOUNDRY_PROJECT_ID="projects/grpc-testing/instances/default_instance"
+
 # TODO(adelez): implement size for test targets and change test_timeout back
 "${KOKORO_GFILE_DIR}/bazel_wrapper.py" \
   --host_jvm_args=-Dbazel.DigestFunction=SHA256 \
@@ -56,8 +58,8 @@ source tools/internal_ci/helper_scripts/prepare_build_linux_rc
   --extra_execution_platforms=//third_party/toolchains:rbe_ubuntu1604 \
   --host_platform=//third_party/toolchains:rbe_ubuntu1604 \
   --platforms=//third_party/toolchains:rbe_ubuntu1604 \
-  --remote_instance_name=grpc-testing/instances/default_instance \
   --test_env=GRPC_VERBOSITY=debug \
+  --remote_instance_name=projects/grpc-testing/instances/default_instance \
   $1 \
   -- //test/... || FAILED="true"
 
diff --git a/tools/internal_ci/linux/grpc_msan_on_foundry.sh b/tools/internal_ci/linux/grpc_msan_on_foundry.sh
index 19cfc1739a2..1ef13ef0d46 100644
--- a/tools/internal_ci/linux/grpc_msan_on_foundry.sh
+++ b/tools/internal_ci/linux/grpc_msan_on_foundry.sh
@@ -35,6 +35,8 @@ cd $(dirname $0)/../../..
 
 source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 
+export KOKORO_FOUNDRY_PROJECT_ID="projects/grpc-testing/instances/default_instance"
+
 "${KOKORO_GFILE_DIR}/bazel_wrapper.py" \
   --host_jvm_args=-Dbazel.DigestFunction=SHA256 \
   test --jobs="200" \
@@ -65,8 +67,8 @@ source tools/internal_ci/helper_scripts/prepare_build_linux_rc
   --extra_execution_platforms=//third_party/toolchains:rbe_ubuntu1604 \
   --host_platform=//third_party/toolchains:rbe_ubuntu1604 \
   --platforms=//third_party/toolchains:rbe_ubuntu1604 \
-  --remote_instance_name=grpc-testing/instances/default_instance \
   --test_env=GRPC_VERBOSITY=debug \
+  --remote_instance_name=projects/grpc-testing/instances/default_instance \
   -- //test/... || FAILED="true"
 
 # Sleep to let ResultStore finish writing results before querying
diff --git a/tools/internal_ci/linux/grpc_ubsan_on_foundry.sh b/tools/internal_ci/linux/grpc_ubsan_on_foundry.sh
index edb2069fb28..e0ae9103c40 100644
--- a/tools/internal_ci/linux/grpc_ubsan_on_foundry.sh
+++ b/tools/internal_ci/linux/grpc_ubsan_on_foundry.sh
@@ -35,6 +35,8 @@ cd $(dirname $0)/../../..
 
 source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 
+export KOKORO_FOUNDRY_PROJECT_ID="projects/grpc-testing/instances/default_instance"
+
 "${KOKORO_GFILE_DIR}/bazel_wrapper.py" \
   --host_jvm_args=-Dbazel.DigestFunction=SHA256 \
   test --jobs="200" \
@@ -62,8 +64,8 @@ source tools/internal_ci/helper_scripts/prepare_build_linux_rc
   --host_platform=//third_party/toolchains:rbe_ubuntu1604 \
   --platforms=//third_party/toolchains:rbe_ubuntu1604 \
   --cache_test_results=no \
-  --remote_instance_name=grpc-testing/instances/default_instance \
   --test_env=GRPC_VERBOSITY=debug \
+  --remote_instance_name=projects/grpc-testing/instances/default_instance \
   -- //test/... || FAILED="true"
 
 # Sleep to let ResultStore finish writing results before querying
diff --git a/tools/internal_ci/linux/pull_request/grpc_ubsan_on_foundry.sh b/tools/internal_ci/linux/pull_request/grpc_ubsan_on_foundry.sh
index f8c93142366..8547fa4d93d 100644
--- a/tools/internal_ci/linux/pull_request/grpc_ubsan_on_foundry.sh
+++ b/tools/internal_ci/linux/pull_request/grpc_ubsan_on_foundry.sh
@@ -35,6 +35,8 @@ cd $(dirname $0)/../../../..
 
 source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 
+export KOKORO_FOUNDRY_PROJECT_ID="projects/grpc-testing/instances/default_instance"
+
 "${KOKORO_GFILE_DIR}/bazel_wrapper.py" \
   --host_jvm_args=-Dbazel.DigestFunction=SHA256 \
   test --jobs="200" \
@@ -61,8 +63,8 @@ source tools/internal_ci/helper_scripts/prepare_build_linux_rc
   --extra_execution_platforms=//third_party/toolchains:rbe_ubuntu1604 \
   --host_platform=//third_party/toolchains:rbe_ubuntu1604 \
   --platforms=//third_party/toolchains:rbe_ubuntu1604 \
-  --remote_instance_name=grpc-testing/instances/default_instance \
   --test_env=GRPC_VERBOSITY=debug \
+  --remote_instance_name=projects/grpc-testing/instances/default_instance \
   -- //test/... || FAILED="true"
 
 if [ "$FAILED" != "" ]