diff --git a/tests/test_parse_comment_telemetry.py b/tests/test_parse_comment_telemetry.py
index 068d50f..5c9058d 100644
--- a/tests/test_parse_comment_telemetry.py
+++ b/tests/test_parse_comment_telemetry.py
@@ -48,7 +48,7 @@ class ParseCommentTelemetry(unittest.TestCase):
             bits = None
 
             if len(vals) is 5 and randint(1, 10) > 5:
-                bits = "{:08b}".format(randint(0, 255))[::-1]
+                bits = "{0:08b}".format(randint(0, 255))[::-1]
 
             testData = self.genTelem(i, vals, bits)