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 098d588e3b0..a202aafb507 100755
--- a/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh
+++ b/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh
@@ -37,7 +37,7 @@ source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 # TODO(adelez): implement size for test targets and change test_timeout back
 "${KOKORO_GFILE_DIR}/bazel_wrapper.py" \
   --host_jvm_args=-Dbazel.DigestFunction=SHA256 \
-  test --jobs="50" \
+  test --jobs="100" \
   --test_timeout="3600,3600,3600,3600" \
   --test_output=errors  \
   --verbose_failures=true  \
diff --git a/tools/internal_ci/linux/grpc_msan_on_foundry.sh b/tools/internal_ci/linux/grpc_msan_on_foundry.sh
index 16586a2d0d0..60b30ff4f65 100644
--- a/tools/internal_ci/linux/grpc_msan_on_foundry.sh
+++ b/tools/internal_ci/linux/grpc_msan_on_foundry.sh
@@ -37,7 +37,7 @@ source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 
 "${KOKORO_GFILE_DIR}/bazel_wrapper.py" \
   --host_jvm_args=-Dbazel.DigestFunction=SHA256 \
-  test --jobs="50" \
+  test --jobs="100" \
   --test_timeout="3600,3600,3600,3600" \
   --test_output=errors  \
   --verbose_failures=true  \
diff --git a/tools/internal_ci/linux/grpc_ubsan_on_foundry.sh b/tools/internal_ci/linux/grpc_ubsan_on_foundry.sh
index cd1a3404318..a87547d1b34 100644
--- a/tools/internal_ci/linux/grpc_ubsan_on_foundry.sh
+++ b/tools/internal_ci/linux/grpc_ubsan_on_foundry.sh
@@ -37,7 +37,7 @@ source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 
 "${KOKORO_GFILE_DIR}/bazel_wrapper.py" \
   --host_jvm_args=-Dbazel.DigestFunction=SHA256 \
-  test --jobs="50" \
+  test --jobs="100" \
   --test_timeout="3600,3600,3600,3600" \
   --test_output=errors  \
   --verbose_failures=true  \