diff --git a/testing/test_pastebin.py b/testing/test_pastebin.py
index 1b5fb1dca..70485fbba 100644
--- a/testing/test_pastebin.py
+++ b/testing/test_pastebin.py
@@ -80,8 +80,8 @@ class TestPaste:
         url, data = mocked_urlopen[0]
         lexer = 'python3' if sys.version_info[0] == 3 else 'python'
         assert url == 'https://bpaste.net'
-        assert 'lexer=%s' % lexer in data
-        assert 'code=full-paste-contents' in data
-        assert 'expiry=1week' in data
+        assert 'lexer=%s' % lexer in data.decode()
+        assert 'code=full-paste-contents' in data.decode()
+        assert 'expiry=1week' in data.decode()