diff --git a/tests/scripts/mbedtls_test.py b/tests/scripts/mbedtls_test.py
index 5570310..8e8a89b 100755
--- a/tests/scripts/mbedtls_test.py
+++ b/tests/scripts/mbedtls_test.py
@@ -80,7 +80,7 @@
         out = re.sub(r'(\\.)|' + split_char,
                      lambda m: m.group(1) or '\n', inp_str,
                      len(inp_str)).split('\n')
-        out = filter(lambda x: x or False, out)
+        out = [x for x in out if x]
         return out
 
     def __parse(self, data_f):