Update mac-build.yml (TESTFLAGS verbose)

Author: fvogelnew1

.github/workflows/mac-build.yml

@@ -146,7 +146,7 @@ jobs:
               export TK_NO_STDERR=1
             }
           fi
-          ( runXvfb :0; make test-classic; exit $? ) | tee out-classic.txt || {
+          ( runXvfb :0; make test-classic TESTFLAGS="-verbose bepst" ; exit $? ) | tee out-classic.txt || {
             echo "::error::Failure during Test (classic)"
             exit 1
           }