diff --git a/Tests/TestHelpers.h b/Tests/TestHelpers.h
index 5d93542..b9e433c 100644
--- a/Tests/TestHelpers.h
+++ b/Tests/TestHelpers.h
@@ -34,7 +34,8 @@ class DirTestHelper
     juce::File file();
 
 private:
-    DirTestHelper(const DirTestHelper &) = default;
+    DirTestHelper(const DirTestHelper &) = delete;
+    DirTestHelper(DirTestHelper &&) = default;
     explicit DirTestHelper(juce::File child);
 
     juce::File m_root{ TEST_TEMP_DIR };