diff --git a/tests/mock_librarybackend.h b/tests/mock_librarybackend.h
index 6ec343834..73bf8a278 100644
--- a/tests/mock_librarybackend.h
+++ b/tests/mock_librarybackend.h
@@ -79,8 +79,8 @@ class MockLibraryBackend : public LibraryBackendInterface {
   void ExpectSetup(bool has_compilations = false,
                    const QStringList& artists = QStringList());
 
-  EXPOSE_SIGNAL1(DirectoriesDiscovered, DirectoryList);
-  EXPOSE_SIGNAL1(DirectoriesDeleted, DirectoryList);
+  EXPOSE_SIGNAL2(DirectoryDiscovered, Directory, SubdirectoryList);
+  EXPOSE_SIGNAL1(DirectoryDeleted, Directory);
 
   EXPOSE_SIGNAL1(SongsDiscovered, SongList);
   EXPOSE_SIGNAL1(SongsDeleted, SongList);
diff --git a/tests/test_utils.h b/tests/test_utils.h
index f0464e67c..58ad8dde8 100644
--- a/tests/test_utils.h
+++ b/tests/test_utils.h
@@ -31,5 +31,7 @@ std::ostream& operator <<(std::ostream& stream, const QNetworkRequest& req);
     void Emit##n() { emit n(); }
 #define EXPOSE_SIGNAL1(n, t1) \
     void Emit##n(const t1& a1) { emit n(a1); }
+#define EXPOSE_SIGNAL2(n, t1, t2) \
+    void Emit##n(const t1& a1, const t2& a2) { emit n(a1, a2); }
 
 #endif  // TEST_UTILS_H