diff --git a/packages/definitions-parser/src/lib/module-info.ts b/packages/definitions-parser/src/lib/module-info.ts
index 6e9b5f1abf..f25fa13e8f 100644
--- a/packages/definitions-parser/src/lib/module-info.ts
+++ b/packages/definitions-parser/src/lib/module-info.ts
@@ -373,7 +373,8 @@ export function getTestDependencies(
     for (const { fileName: ref } of referencedFiles) {
       throw new Error(`Test files should not use '<reference path="" />'. '${filePath()}' references '${ref}'.`);
     }
-    for (const { fileName: referencedPackage } of typeReferenceDirectives) {
+    for (const { fileName: ref } of typeReferenceDirectives) {
+      const referencedPackage = rootName(ref, typeFiles, packageName);
       if (dependencies.has(referencedPackage)) {
         throw new Error(
           `'${filePath()}' unnecessarily references '${referencedPackage}', which is already referenced in the type definition.`
diff --git a/packages/definitions-parser/test/module-info.test.ts b/packages/definitions-parser/test/module-info.test.ts
index 62797f9276..5de8b3f83e 100644
--- a/packages/definitions-parser/test/module-info.test.ts
+++ b/packages/definitions-parser/test/module-info.test.ts
@@ -133,5 +133,18 @@ testo({
     const i = getModuleInfo("boring", types);
     const d = getTestDependencies("boring", types, tests.keys(), i.dependencies, fs.subDir("types").subDir("boring"));
     expect(d).toEqual(new Set(["super-big-fun-hus"]));
+  },
+  getTestDependenciesRemovesInternalPaths() {
+    const pkg = new Dir(undefined);
+    pkg.set(
+      "mock-tests.ts",
+      `/// <reference types="test-dependency/component" />
+`
+    );
+    const memFS = new InMemoryFS(pkg, "types/mock");
+    const { types, tests } = allReferencedFiles(["mock-tests.ts"], memFS, "mock", "types/mock");
+    const { dependencies } = getModuleInfo("mock", types);
+    const testDependencies = getTestDependencies("mock", types, tests.keys(), dependencies, memFS);
+    expect(Array.from(testDependencies)).toEqual(["test-dependency"]);
   }
 });