diff --git a/tests/conftest.py b/tests/conftest.py
index 9046f7c..68e5dcd 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -113,6 +113,8 @@ def collect(self):
             extra_args = yaml.safe_load(extra_args_path.read_text())
             args += extra_args
 
+        # Avoid overly long image names
+        args.append("--image-name=" + "-".join(self.path.parent.parts[-3:]))
         args.append(str(self.path.parent))
 
         yield Repo2DockerTest.from_parent(self, name="build", args=args)