1 files changed, 6 insertions, 6 deletions
diff --git a/packages/core/src/tools/grep.test.ts b/packages/core/src/tools/grep.test.ts
index ae629a52..75cf1d28 100644
--- a/packages/core/src/tools/grep.test.ts
+++ b/packages/core/src/tools/grep.test.ts
@@ -80,8 +80,8 @@ describe('GrepTool', () => {
 
     it('should return error if pattern is missing', () => {
       const params = { path: '.' } as unknown as GrepToolParams;
-      expect(grepTool.validateToolParams(params)).toContain(
-        'Parameters failed schema validation',
+      expect(grepTool.validateToolParams(params)).toBe(
+        `params must have required property 'pattern'`,
       );
     });
 
@@ -204,11 +204,11 @@ describe('GrepTool', () => {
     it('should return an error if params are invalid', async () => {
       const params = { path: '.' } as unknown as GrepToolParams; // Invalid: pattern missing
       const result = await grepTool.execute(params, abortSignal);
-      expect(result.llmContent).toContain(
-        'Error: Invalid parameters provided. Reason: Parameters failed schema validation',
+      expect(result.llmContent).toBe(
+        "Error: Invalid parameters provided. Reason: params must have required property 'pattern'",
       );
-      expect(result.returnDisplay).toContain(
-        'Model provided invalid parameters. Error: Parameters failed schema validation',
+      expect(result.returnDisplay).toBe(
+        "Model provided invalid parameters. Error: params must have required property 'pattern'",
       );
     });
   });