diff --git a/tools/lint/test/test_yaml.py b/tools/lint/test/test_yaml.py
index a540c43b4ceb..c4d206086439 100644
--- a/tools/lint/test/test_yaml.py
+++ b/tools/lint/test/test_yaml.py
@@ -11,7 +11,7 @@ def test_basic(lint, paths):
 
     assert len(results) == 2
 
-    assert "line too long (122 > 80 characters)'" in results[0].message
+    assert "line too long (122 > 80 characters)" in results[0].message
     assert results[0].level == "error"
     assert "bad.yml" in results[0].relpath
     assert results[0].lineno == 3
diff --git a/tools/lint/yamllint_/__init__.py b/tools/lint/yamllint_/__init__.py
index 5efd66f7449b..f1304ac66c97 100644
--- a/tools/lint/yamllint_/__init__.py
+++ b/tools/lint/yamllint_/__init__.py
@@ -22,8 +22,7 @@ Unable to install correct version of yamllint
 Try to install it manually with:
     $ pip install -U --require-hashes -r {}
 """.strip().format(YAMLLINT_REQUIREMENTS_PATH)
-
-YAMLLINT_FORMAT_REGEX = re.compile(b'(.*):(.*):(.*): \[(error|warning)\] (.*) \((.*)\)$')
+YAMLLINT_FORMAT_REGEX = re.compile('(.*):(.*):(.*): \[(error|warning)\] (.*) \((.*)\)$')
 
 results = []