diff --git a/swh/graph/tests/test_cli.py b/swh/graph/tests/test_cli.py
--- a/swh/graph/tests/test_cli.py
+++ b/swh/graph/tests/test_cli.py
@@ -6,6 +6,7 @@
 from pathlib import Path
 from tempfile import TemporaryDirectory
 from typing import Dict
+from yaml import dump
 
 from click.testing import CliRunner
 
@@ -34,10 +35,21 @@
     runner = CliRunner()
 
     with TemporaryDirectory(suffix=".swh-graph-test") as tmpdir:
+        config_path = Path(tmpdir, "config.yml")
+        with open(config_path, "w") as f:
+            dump(config, f)
+
         result = runner.invoke(
             cli,
-            ["compress", "--graph", DATA_DIR / "example", "--outdir", tmpdir],
-            obj={"config": config},
+            [
+                "--config-file",
+                config_path,
+                "compress",
+                "--graph",
+                DATA_DIR / "example",
+                "--outdir",
+                tmpdir,
+            ],
         )
         assert result.exit_code == 0, result
         properties = read_properties(Path(tmpdir) / "example.properties")