diff --git a/test/katch.js b/test/katch.js
index 6e4bfc3..464585a 100644
--- a/test/katch.js
+++ b/test/katch.js
@@ -339,6 +339,24 @@ describe('katch', () => {
         }
     });
 
+    it('addLevel level bad level type', done => {
+        try {
+            katch.addLevel(123);
+        } catch (e) {
+            console.log(e);
+            done();
+        }
+    });
+
+    it('addLevel level bad code type', done => {
+        try {
+            katch.addLevel('info321', '34');
+        } catch (e) {
+            console.log(e);
+            done();
+        }
+    });
+
     it('addLevel level not allowed', done => {
         try {
             katch.addLevel('wrap', 123);
@@ -381,6 +399,16 @@ describe('katch', () => {
         }
     });
 
+    it('removeLevel level system 2', done => {
+        try {
+            katch.removeLevel('ERROR');
+        } catch (e) {
+            console.log(e);
+            if(e.message === 'cannot remove a default level')
+                done();
+        }
+    });
+
     it('removeLevel unknown level', done => {
         try {
             katch.removeLevel('level_x');