diff --git a/tests/claude-md.test.cjs b/tests/claude-md.test.cjs
index 8b204f434..7e4bb6d1e 100644
--- a/tests/claude-md.test.cjs
+++ b/tests/claude-md.test.cjs
@@ -65,18 +65,20 @@ describe('new-project workflow includes CLAUDE.md generation', () => {
   const workflowPath = path.join(__dirname, '..', 'get-shit-done', 'workflows', 'new-project.md');
   const commandsPath = path.join(__dirname, '..', 'docs', 'COMMANDS.md');
 
-  test('new-project workflow generates CLAUDE.md before final commit', () => {
+  test('new-project workflow generates instruction file before final commit', () => {
     const content = fs.readFileSync(workflowPath, 'utf-8');
     assert.ok(content.includes('generate-claude-md'));
-    assert.ok(content.includes('--files .planning/ROADMAP.md .planning/STATE.md .planning/REQUIREMENTS.md CLAUDE.md'));
+    // Codex fix: workflow now uses $INSTRUCTION_FILE (AGENTS.md for Codex, CLAUDE.md otherwise)
+    assert.ok(content.includes('--files .planning/ROADMAP.md .planning/STATE.md .planning/REQUIREMENTS.md "$INSTRUCTION_FILE"'));
   });
 
-  test('new-project artifacts mention CLAUDE.md', () => {
+  test('new-project artifacts reference instruction file variable', () => {
     const workflowContent = fs.readFileSync(workflowPath, 'utf-8');
     const commandsContent = fs.readFileSync(commandsPath, 'utf-8');
 
-    assert.ok(workflowContent.includes('| Project guide  | `CLAUDE.md`'));
-    assert.ok(workflowContent.includes('- `CLAUDE.md`'));
+    // Codex fix: hardcoded CLAUDE.md replaced with $INSTRUCTION_FILE variable
+    assert.ok(workflowContent.includes('| Project guide  | `$INSTRUCTION_FILE`'));
+    assert.ok(workflowContent.includes('- `$INSTRUCTION_FILE`'));
     assert.ok(commandsContent.includes('`CLAUDE.md`'));
   });
 });