counteract the addressing default for the test

Change-Id: I7fc8936a753928a77b8df62ed205f1202122e47c
diff --git a/sc/qa/unit/ucalc.cxx b/sc/qa/unit/ucalc.cxx
index cab47a6..e2cee79 100644
--- a/sc/qa/unit/ucalc.cxx
+++ b/sc/qa/unit/ucalc.cxx
@@ -4414,6 +4414,7 @@
     SfxMedium* pMedium = new SfxMedium(aDocName, STREAM_STD_READWRITE);
     m_xDocShRef->DoInitNew(pMedium);
     m_pDoc = m_xDocShRef->GetDocument();
+    m_pDoc->SetGrammar(formula::FormulaGrammar::GRAM_NATIVE);
 
     ScDocShellRef xExtDocSh = new ScDocShell;
     OUString aExtDocName("file:///extdata.fake");
@@ -4425,6 +4426,7 @@
                            findLoadedDocShellByName(aExtDocName) != NULL);
 
     ScDocument* pExtDoc = xExtDocSh->GetDocument();
+    pExtDoc->SetGrammar(formula::FormulaGrammar::GRAM_NATIVE);
     pExtDoc->InsertTab(0, aExtSh1Name);
     pExtDoc->InsertTab(1, aExtSh2Name);