[trivial] Use proper test cases on `unittest` (#2775)

diff --git a/tests/test_black.py b/tests/test_black.py
index 91d10581f6f893794fa1802aeafdda72939f7a13..202fe23ddcd940e482a37aba1df64328d99303cf 100644 (file)
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -940,8 +940,8 @@ class BlackTestCase(BlackBaseTestCase):
                 self.assertFormatEqual("j = [1, 2, 3]", "j = [1, 2, 3,]")
 
         out_str = "".join(out_lines)
-        self.assertTrue("Expected tree:" in out_str)
-        self.assertTrue("Actual tree:" in out_str)
+        self.assertIn("Expected tree:", out_str)
+        self.assertIn("Actual tree:", out_str)
         self.assertEqual("".join(err_lines), "")
 
     @event_loop()

diff --git a/tests/test_primer.py b/tests/test_primer.py
index 9bb401574ca1c2bb296170f7b9dce84dca9ca4dd..0a9d2aec495042229c7e93ea011d361ba7f48302 100644 (file)
--- a/tests/test_primer.py
+++ b/tests/test_primer.py
@@ -181,7 +181,7 @@ class PrimerLibTests(unittest.TestCase):
         stdout, stderr = loop.run_until_complete(
             lib._gen_check_output([lib.BLACK_BINARY, "--help"])
         )
-        self.assertTrue("The uncompromising code formatter" in stdout.decode("utf8"))
+        self.assertIn("The uncompromising code formatter", stdout.decode("utf8"))
         self.assertEqual(None, stderr)
 
         # TODO: Add a test to see failure works on Windows