diff --git a/crates/tools/src/lib.rs b/crates/tools/src/lib.rs
index b8be58246..432011311 100644
--- a/crates/tools/src/lib.rs
+++ b/crates/tools/src/lib.rs
@@ -559,4 +559,13 @@ mod tests {
             "Failed to validate input: missing required field 'path'"
         );
     }
+
+    #[test]
+    fn tool_error_invalid_input_creates_correct_variant() {
+        let err = ToolError::invalid_input("test invalid message");
+        match err {
+            ToolError::InvalidInput { message } => assert_eq!(message, "test invalid message"),
+            _ => panic!("Expected ToolError::InvalidInput, got {:?}", err),
+        }
+    }
 }