diff --git a/joj3_config_generator/main.py b/joj3_config_generator/main.py
index ebd7b0f..28ce068 100644
--- a/joj3_config_generator/main.py
+++ b/joj3_config_generator/main.py
@@ -98,7 +98,9 @@ def convert(
         if not any(p != repo_toml_path for p in repo_toml_path.parent.glob("*.toml")):
             fallback_toml_path = repo_toml_path.parent / "conf.toml"
             if not fallback_toml_path.exists():
-                fallback_toml_path.write_text('name = "invalid commit"\n')
+                fallback_toml_path.write_text(
+                    'name = "invalid commit"\nmax-total-score = 0\n'
+                )
         for task_toml_path in repo_toml_path.parent.glob("**/*.toml"):
             if repo_toml_path == task_toml_path:
                 continue
diff --git a/tests/convert/empty/task.json b/tests/convert/empty/task.json
index 73a928a..b012516 100644
--- a/tests/convert/empty/task.json
+++ b/tests/convert/empty/task.json
@@ -114,7 +114,7 @@
                                 "--grading-repo-name",
                                 "JOJ3-config-generator",
                                 "--max-total-score",
-                                "100",
+                                "0",
                                 "--issue-label-name",
                                 "Kind/Testing",
                                 "--issue-label-color",
diff --git a/tests/convert/empty/task.toml b/tests/convert/empty/task.toml
index c3a3081..12cc5b6 100644
--- a/tests/convert/empty/task.toml
+++ b/tests/convert/empty/task.toml
@@ -1 +1,2 @@
 name = "invalid commit"
+max-total-score = 0