diff --git a/test/test.sh b/test/test.sh
index 36e57c3..2e53fb0 100755
--- a/test/test.sh
+++ b/test/test.sh
@@ -94,6 +94,9 @@
   done;
 done;
 
+# delete Unix Domain Socket used by cpp tests
+rm -f /tmp/ThriftTest.thrift
+
 do_test "py-py" "binary" "buffered-ip" \
         "py/TestClient.py --proto=binary --port=9090 --host=localhost --genpydir=py/gen-py" \
         "py/TestServer.py --proto=binary --port=9090 --genpydir=py/gen-py TSimpleServer" \