diff --git a/tools/const_finder/test/fixtures/.dart_tool/package_config.json b/tools/const_finder/test/fixtures/.dart_tool/package_config.json
new file mode 100644
index 00000000000..a820d2e6b22
--- /dev/null
+++ b/tools/const_finder/test/fixtures/.dart_tool/package_config.json
@@ -0,0 +1,15 @@
+{
+    "configVersion": 2,
+    "packages": [
+        {
+            "name": "const_finder_fixtures",
+            "rootUri": "../lib/",
+            "languageVersion": "2.9"
+        },
+        {
+            "name": "const_finder_fixtures_package",
+            "rootUri": "../pkg/",
+            "languageVersion": "2.9"
+        }
+    ]
+}