diff --git a/src/commands.hxx b/src/commands.hxx
index f685c4b..2cb2a93 100644
--- a/src/commands.hxx
+++ b/src/commands.hxx
@@ -602,7 +602,11 @@ class Script: public QObject {
         xml::Node testcase("testcase");
         try {
           testcase.attr("classname") =
-            xmlattr(_testclass.size()?_testclass:"file: "+(*cmd)->file(), true)
+            xmlattr(_testclass.size()
+                    ?_testclass
+                    :"file."+(*cmd)->file()
+                    .replace(QRegularExpression(".wt$"), "")
+                    .replace(".", "-"), true)
             .toStdString();
           testcase.attr("name") = 
             xmlattr(QString("%1: %2")