diff --git a/closure/compiler/test/goog_es6_interop/BUILD b/closure/compiler/test/goog_es6_interop/BUILD
index 0c5cb084a..ea4782eee 100644
--- a/closure/compiler/test/goog_es6_interop/BUILD
+++ b/closure/compiler/test/goog_es6_interop/BUILD
@@ -15,13 +15,21 @@
 load("//closure/compiler:closure_js_library.bzl", "closure_js_library")
 load("//closure/testing:closure_js_test.bzl", "closure_js_test")
 
+closure_js_library(
+    name = "string",
+    srcs = [
+        "string.js",
+    ],
+    suppress = ["useOfGoogProvide"],
+)
+
 closure_js_library(
     name = "person",
     srcs = [
         "person.js",
     ],
     deps = [
-        "@com_google_javascript_closure_library//closure/goog/string",
+        ":string",
     ],
 )
 
diff --git a/closure/compiler/test/goog_es6_interop/person.js b/closure/compiler/test/goog_es6_interop/person.js
index 0b2b02b44..157d3d6d3 100644
--- a/closure/compiler/test/goog_es6_interop/person.js
+++ b/closure/compiler/test/goog_es6_interop/person.js
@@ -16,7 +16,7 @@
  * @fileoverview A person, implementes as ES6 module.
  */
 
-import {capitalize} from 'goog:goog.string';
+import {capitalize} from 'goog:person.string';
 
 /**
  * Represents a person.
diff --git a/closure/compiler/test/goog_es6_interop/string.js b/closure/compiler/test/goog_es6_interop/string.js
new file mode 100644
index 000000000..5bcae76f3
--- /dev/null
+++ b/closure/compiler/test/goog_es6_interop/string.js
@@ -0,0 +1,27 @@
+// Copyright 2024 The Closure Rules Authors. All rights reserved.
+//
+// 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.
+
+/**
+ * @fileoverview A goog.provide file for testing interoperability.
+ */
+goog.provide('person.string');
+
+/**
+ * @param {string} str String value to capitalize.
+ * @return {string} String value with first letter in uppercase.
+ */
+person.string.capitalize = function(str) {
+  return String(str.charAt(0)).toUpperCase() +
+      String(str.slice(1)).toLowerCase();
+};