diff --git a/core/db.py b/core/db.py
index 09ac716..dfc7047 100644
--- a/core/db.py
+++ b/core/db.py
@@ -702,6 +702,13 @@ def _migrate(conn: sqlite3.Connection):
         conn.execute("ALTER TABLE projects ADD COLUMN test_command TEXT DEFAULT NULL")
         conn.commit()
 
+    # KIN-102: Reset legacy 'make test' default — projects using old schema default get auto-detection.
+    # Any project with a real Makefile should have test_command set explicitly, not via this default.
+    conn.execute(
+        "UPDATE projects SET test_command = NULL WHERE test_command = 'make test'"
+    )
+    conn.commit()
+
     # Rename legacy 'auto' → 'auto_complete' (KIN-063)
     conn.execute(
         "UPDATE projects SET execution_mode = 'auto_complete' WHERE execution_mode = 'auto'"