diff --git a/sw/qa/extras/inc/swmodeltestbase.hxx b/sw/qa/extras/inc/swmodeltestbase.hxx
index d16388194290..b55a8eb4f2a0 100644
--- a/sw/qa/extras/inc/swmodeltestbase.hxx
+++ b/sw/qa/extras/inc/swmodeltestbase.hxx
@@ -275,6 +275,7 @@ private:
 
         // create the dump
         SwXTextDocument* pTxtDoc = dynamic_cast<SwXTextDocument *>(mxComponent.get());
+        CPPUNIT_ASSERT(pTxtDoc);
         SwDoc* pDoc = pTxtDoc->GetDocShell()->GetDoc();
         SwRootFrm* pLayout = pDoc->GetCurrentLayout();
         pLayout->dumpAsXml(pXmlWriter);