diff --git a/swebench/harness/docker_build.py b/swebench/harness/docker_build.py
index d7bcf8ee..7eb490b2 100644
--- a/swebench/harness/docker_build.py
+++ b/swebench/harness/docker_build.py
@@ -1,7 +1,10 @@
+from __future__ import annotations
+
 import logging
 import re
 import traceback
 import docker
+import docker.errors
 from tqdm import tqdm
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from pathlib import Path
@@ -315,8 +318,8 @@ def build_env_images(
                     traceback.print_exc()
                     failed.append(futures[future])
                     continue
-                except Exception as e:
-                    print(f"Error building image")
+                except Exception:
+                    print("Error building image")
                     traceback.print_exc()
                     failed.append(futures[future])
                     continue
@@ -390,8 +393,8 @@ def build_instance_images(
                     traceback.print_exc()
                     failed.append(futures[future])
                     continue
-                except Exception as e:
-                    print(f"Error building image")
+                except Exception:
+                    print("Error building image")
                     traceback.print_exc()
                     failed.append(futures[future])
                     continue
@@ -409,7 +412,7 @@ def build_instance_images(
 def build_instance_image(
         test_spec: TestSpec,
         client: docker.DockerClient,
-        logger: logging.Logger,
+        logger: logging.Logger|None,
         nocache: bool,
     ):
     """
diff --git a/swebench/harness/docker_utils.py b/swebench/harness/docker_utils.py
index 1ab186b3..2a1dddf2 100644
--- a/swebench/harness/docker_utils.py
+++ b/swebench/harness/docker_utils.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import docker
+import docker.errors
 import os
 import signal
 import tarfile
@@ -284,7 +285,7 @@ def clean_images(
     """
     images = list_images(client)
     removed = 0
-    print(f"Cleaning cached images...")
+    print("Cleaning cached images...")
     for image_name in images:
         if should_remove(image_name, cache_level, clean, prior_images):
             try:
diff --git a/swebench/harness/test_spec.py b/swebench/harness/test_spec.py
index 959b34bd..109e24e5 100644
--- a/swebench/harness/test_spec.py
+++ b/swebench/harness/test_spec.py
@@ -128,11 +128,11 @@ def make_repo_script_list(specs, repo, repo_directory, base_commit, env_name):
         f"cd {repo_directory}",
         f"git reset --hard {base_commit}",
         # Remove the remote so the agent won't see newer commits.
-        f"git remote remove origin",
+        "git remote remove origin",
         # Make sure conda is available for later use
         "source /opt/miniconda3/bin/activate",
         f"conda activate {env_name}",
-        f'echo "Current environment: $CONDA_DEFAULT_ENV"',
+        'echo "Current environment: $CONDA_DEFAULT_ENV"',
     ]
     if repo in MAP_REPO_TO_INSTALL:
         setup_commands.append(MAP_REPO_TO_INSTALL[repo])
@@ -254,7 +254,7 @@ def make_eval_script_list(instance, specs, env_name, repo_directory, base_commit
         ]
     )
     eval_commands = [
-        f"source /opt/miniconda3/bin/activate",
+        "source /opt/miniconda3/bin/activate",
         f"conda activate {env_name}",
         f"cd {repo_directory}",
     ]
@@ -264,8 +264,8 @@ def make_eval_script_list(instance, specs, env_name, repo_directory, base_commit
         f"git config --global --add safe.directory {repo_directory}",  # for nonroot user
         f"cd {repo_directory}",
         # This is just informational, so we have a record
-        f"git status",
-        f"git show",
+        "git status",
+        "git show",
         f"git diff {base_commit}",
         "source /opt/miniconda3/bin/activate",
         f"conda activate {env_name}",