diff --git a/tutor/commands/dev.py b/tutor/commands/dev.py
index 184b99b..46f500e 100644
--- a/tutor/commands/dev.py
+++ b/tutor/commands/dev.py
@@ -18,7 +18,9 @@ class DevJobRunner(compose.ComposeJobRunner):
         """
         super().__init__(root, config)
         self.project_name = get_typed(self.config, "DEV_PROJECT_NAME", str)
-        self.docker_compose_tmp_path = tutor_env.pathjoin(self.root, "dev", "docker-compose.tmp.yml")
+        self.docker_compose_tmp_path = tutor_env.pathjoin(
+            self.root, "dev", "docker-compose.tmp.yml"
+        )
         self.docker_compose_files += [
             tutor_env.pathjoin(self.root, "local", "docker-compose.yml"),
             tutor_env.pathjoin(self.root, "dev", "docker-compose.yml"),
diff --git a/tutor/commands/local.py b/tutor/commands/local.py
index 5adda36..a26ee07 100644
--- a/tutor/commands/local.py
+++ b/tutor/commands/local.py
@@ -20,7 +20,9 @@ class LocalJobRunner(compose.ComposeJobRunner):
         """
         super().__init__(root, config)
         self.project_name = get_typed(self.config, "LOCAL_PROJECT_NAME", str)
-        self.docker_compose_tmp_path = tutor_env.pathjoin(self.root, "dev", "docker-compose.tmp.yml")
+        self.docker_compose_tmp_path = tutor_env.pathjoin(
+            self.root, "dev", "docker-compose.tmp.yml"
+        )
         self.docker_compose_files += [
             tutor_env.pathjoin(self.root, "local", "docker-compose.yml"),
             tutor_env.pathjoin(self.root, "local", "docker-compose.prod.yml"),