diff --git a/TEST_MAPPING b/TEST_MAPPING
new file mode 100644
index 0000000..05c6d70
--- /dev/null
+++ b/TEST_MAPPING
@@ -0,0 +1,20 @@
+// Generated by update_crate_tests.py for tests that depend on this crate.
+{
+  "presubmit": [
+    {
+      "name": "base64_device_test_tests_decode"
+    },
+    {
+      "name": "base64_device_test_tests_encode"
+    },
+    {
+      "name": "base64_device_test_tests_helpers"
+    },
+    {
+      "name": "unicode-xid_device_test_src_lib"
+    },
+    {
+      "name": "unicode-xid_device_test_tests_exhaustive_tests"
+    }
+  ]
+}