diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 127d5b682..628c53504 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
             - uses: actions/setup-python@v4
               with:
                   python-version: '3.x'
-            - run: pip install -U ruff==0.0.284
+            - run: pip install -U ruff==0.1.8
             - name: Run ruff
               run: ruff docker tests
 
diff --git a/docker/models/containers.py b/docker/models/containers.py
index 4725d6f6f..32676bb85 100644
--- a/docker/models/containers.py
+++ b/docker/models/containers.py
@@ -903,9 +903,9 @@ def run(self, image, command=None, stdout=True, stderr=False,
                 container, exit_status, command, image, out
             )
 
-        return out if stream or out is None else b''.join(
-            [line for line in out]
-        )
+        if stream or out is None:
+            return out
+        return b''.join(out)
 
     def create(self, image, command=None, **kwargs):
         """