diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 18a6fb41e..653eb8084 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -40,7 +40,7 @@ jobs:
         shell: bash -l {0}
         run: |
           pip install -e .[test_full]
-          pytest -v fsspec/tests/test_spec.py
+          pytest -v
 
   win:
     name: pytest-win
diff --git a/fsspec/tests/test_spec.py b/fsspec/tests/test_spec.py
index 798e162b2..3a6d5c433 100644
--- a/fsspec/tests/test_spec.py
+++ b/fsspec/tests/test_spec.py
@@ -752,10 +752,10 @@ def test_cache_not_pickled(server):
         cache_type="readahead",
         headers={"give_length": "true", "head_ok": "true"},
     )
-    # fs = fsspec.filesystem("readahead", target_protocol="http")
     filepath = server.realfile
     length = 3
     f = fs.open(filepath, mode="rb")
+    assert isinstance(f, AbstractBufferedFile)
     assert not f.cache.cache  # No cache initially
     assert f.read(length=length) == data[:length]
     assert f.cache.cache == data  # Cache is populated