diff --git a/pyproject.toml b/pyproject.toml
index 0407e4b..ddbe670 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ test = [
     'pytest',
     'pytest-cov',
     'pytest-ruff',
-    'ruff==0.4.10',
+    'ruff==0.6.3',
 ]
 
 [project.scripts]
diff --git a/tests/conftest.py b/tests/conftest.py
index 2a9070d..a67803d 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -7,7 +7,7 @@
 pytest.register_assert_rewrite('tests.common')
 
 
-@pytest.fixture()
+@pytest.fixture
 def content():
     def _reader(filename):
         with open(filename) as f:
@@ -16,7 +16,7 @@ def _reader(filename):
     return _reader
 
 
-@pytest.fixture()
+@pytest.fixture
 def expected(request):
     filename = os.path.splitext(request.module.__file__)[0]
     filename += f'.{request.function.__name__}.exp'
@@ -25,7 +25,7 @@ def expected(request):
         return f.read()
 
 
-@pytest.fixture()
+@pytest.fixture
 def rpath(request):
     def _path_resolver(filename):
         path = os.path.join(
@@ -41,7 +41,7 @@ def _path_resolver(filename):
     return _path_resolver
 
 
-@pytest.fixture()
+@pytest.fixture
 def stringio():
     return StringIO()
 
@@ -51,6 +51,6 @@ def isatty(self):
         return True
 
 
-@pytest.fixture()
+@pytest.fixture
 def stringio_tty():
     return _StringIOTTY()
diff --git a/tests/test_diff.py b/tests/test_diff.py
index a28bb91..a8211bc 100644
--- a/tests/test_diff.py
+++ b/tests/test_diff.py
@@ -42,7 +42,7 @@ def local_function_cant_be_pickled():
     a = [local_function_cant_be_pickled]
     b = []
 
-    with pytest.raises(Exception, match="Can't pickle"):
+    with pytest.raises(Exception, match="Can't"):
         Differ().diff(a, b)