diff --git a/tests/Makefile b/tests/Makefile
index e8091cc..e344635 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -205,9 +205,9 @@
 
 clean:
 ifndef WINDOWS
-	rm -rf $(APPS) *.c *.data TESTS
+	rm -rf $(APPS) *.c *.datax TESTS
 else
-	del /Q /F *.c *.exe *.data
+	del /Q /F *.c *.exe *.datax
 	rmdir /Q /S TESTS
 endif
 
diff --git a/tests/scripts/generate_test_code.py b/tests/scripts/generate_test_code.py
index c62b5b9..ccb2d5f 100755
--- a/tests/scripts/generate_test_code.py
+++ b/tests/scripts/generate_test_code.py
@@ -732,7 +732,7 @@
     data_name = os.path.splitext(data_file_name)[0]
 
     out_c_file = os.path.join(args.out_dir, data_name + '.c')
-    out_data_file = os.path.join(args.out_dir, data_file_name)
+    out_data_file = os.path.join(args.out_dir, data_name + '.datax')
 
     out_c_file_dir = os.path.dirname(out_c_file)
     out_data_file_dir = os.path.dirname(out_data_file)