Allow comments in test data files
diff --git a/tests/suites/test_suite_mdx.data b/tests/suites/test_suite_mdx.data
index 2d403b4..3d063a4 100644
--- a/tests/suites/test_suite_mdx.data
+++ b/tests/suites/test_suite_mdx.data
@@ -1,3 +1,4 @@
+# Test MD2, MD4, MD5 and RIPEMD160
 mbedtls_md2 Test vector RFC1319 #1
 md2_text:"":"8350e5a3e24c153df2275c9f80692773"