diff --git a/dlls/msi/tests/automation.c b/dlls/msi/tests/automation.c
index 03154e1d322..2c741e8a99e 100644
--- a/dlls/msi/tests/automation.c
+++ b/dlls/msi/tests/automation.c
@@ -804,7 +804,7 @@ static HRESULT Installer_RegistryValueI(HKEY hkey, LPCWSTR szKey, int iValue, LP
     V_I4(&vararg) = iValue;
 
     hr = Installer_RegistryValue(hkey, szKey, vararg, &varresult, vtResult);
-    if (vtResult == VT_BSTR) lstrcpyW(szString, V_BSTR(&varresult));
+    if (SUCCEEDED(hr) && vtResult == VT_BSTR) lstrcpyW(szString, V_BSTR(&varresult));
     VariantClear(&varresult);
     return hr;
 }