diff --git a/tests/integration/test_httpx.py b/tests/integration/test_httpx.py
index a69b6c44..723daed7 100644
--- a/tests/integration/test_httpx.py
+++ b/tests/integration/test_httpx.py
@@ -286,6 +286,7 @@ def test_stream(tmpdir, httpbin, do_request):
         assert len(cassette_content) == 512
         assert cassette.play_count == 1
 
+
 @pytest.mark.online
 def test_text_content_type(tmpdir, httpbin, do_request):
     url = httpbin.url + "/json"
@@ -297,7 +298,8 @@ def test_text_content_type(tmpdir, httpbin, do_request):
         cassette_response = do_request()("GET", url)
         assert cassette_response.content == response.content
         assert cassette.play_count == 1
-        assert isinstance(cassette.responses[0]['content'], str)
+        assert isinstance(cassette.responses[0]["content"], str)
+
 
 @pytest.mark.online
 def test_binary_content_type(tmpdir, httpbin, do_request):
@@ -310,4 +312,4 @@ def test_binary_content_type(tmpdir, httpbin, do_request):
         cassette_response = do_request()("GET", url)
         assert cassette_response.content == response.content
         assert cassette.play_count == 1
-        assert isinstance(cassette.responses[0]['content'], bytes)
+        assert isinstance(cassette.responses[0]["content"], bytes)
diff --git a/vcr/stubs/httpx_stubs.py b/vcr/stubs/httpx_stubs.py
index 140c0aba..4d4b96a0 100644
--- a/vcr/stubs/httpx_stubs.py
+++ b/vcr/stubs/httpx_stubs.py
@@ -33,7 +33,6 @@ def _transform_headers(httpx_response):
     return out
 
 
-
 def _to_serialized_response(httpx_response):
     try:
         content = httpx_response.content.decode("utf-8")