diff --git a/src/Utils.js b/src/Utils.js
index dc1401d85..f89897240 100644
--- a/src/Utils.js
+++ b/src/Utils.js
@@ -64,6 +64,7 @@ export function nodeEqual(a, b) {
   if (a === b) return true;
   if (!a || !b) return false;
   if (a.type !== b.type) return false;
+
   const left = propsOfNode(a);
   const leftKeys = Object.keys(left);
   const right = propsOfNode(b);
@@ -80,7 +81,12 @@ export function nodeEqual(a, b) {
       return false;
     }
   }
-  return leftKeys.length === Object.keys(right).length;
+
+  if (typeof a !== 'string' && typeof a !== 'number') {
+    return leftKeys.length === Object.keys(right).length;
+  }
+
+  return false;
 }
 
 // 'click' => 'onClick'
diff --git a/src/__tests__/ShallowWrapper-spec.js b/src/__tests__/ShallowWrapper-spec.js
index 5a4698c3a..718df00c0 100644
--- a/src/__tests__/ShallowWrapper-spec.js
+++ b/src/__tests__/ShallowWrapper-spec.js
@@ -83,6 +83,38 @@ describe('shallow', () => {
       expect(wrapper.contains(b)).to.equal(true);
     });
 
+    it('should work with strings', () => {
+      const wrapper = shallow(<div>foo</div>);
+
+      expect(wrapper.contains('foo')).to.equal(true);
+      expect(wrapper.contains('bar')).to.equal(false);
+    });
+
+    it('should work with numbers', () => {
+      const wrapper = shallow(<div>{1}</div>);
+
+      expect(wrapper.contains(1)).to.equal(true);
+      expect(wrapper.contains(2)).to.equal(false);
+      expect(wrapper.contains('1')).to.equal(false);
+    });
+
+    it('should work with nested strings & numbers', () => {
+      const wrapper = shallow(
+        <div>
+          <div>
+            <div>{5}</div>
+          </div>
+          <div>foo</div>
+        </div>
+      );
+
+      expect(wrapper.contains('foo')).to.equal(true);
+      expect(wrapper.contains(<div>foo</div>)).to.equal(true);
+
+      expect(wrapper.contains(5)).to.equal(true);
+      expect(wrapper.contains(<div>{5}</div>)).to.equal(true);
+    });
+
   });
 
   describe('.equals(node)', () => {