diff --git a/test/ReactWrapper-spec.jsx b/test/ReactWrapper-spec.jsx
index 20664b0f1..0b95102bc 100644
--- a/test/ReactWrapper-spec.jsx
+++ b/test/ReactWrapper-spec.jsx
@@ -2648,25 +2648,26 @@ describeWithDOM('mount', () => {
         const Foo = () => <div className="in-foo" />;
 
         const div = global.document.createElement('div');
+        const initialBodyChildren = document.body.childNodes.length;
         global.document.body.appendChild(div);
 
-        expect(document.body.childNodes).to.have.length(1);
+        expect(document.body.childNodes).to.have.length(initialBodyChildren + 1);
         expect(div.childNodes).to.have.length(0);
 
         const wrapper = mount(<Foo />, { attachTo: div });
 
         expect(wrapper.find('.in-foo')).to.have.length(1);
-        expect(document.body.childNodes).to.have.length(1);
+        expect(document.body.childNodes).to.have.length(initialBodyChildren + 1);
         expect(div.childNodes).to.have.length(1);
 
         wrapper.detach();
 
-        expect(document.body.childNodes).to.have.length(1);
+        expect(document.body.childNodes).to.have.length(initialBodyChildren + 1);
         expect(div.childNodes).to.have.length(0);
 
         global.document.body.removeChild(div);
 
-        expect(document.body.childNodes).to.have.length(0);
+        expect(document.body.childNodes).to.have.length(initialBodyChildren);
         expect(div.childNodes).to.have.length(0);
       });
 
@@ -2676,15 +2677,16 @@ describeWithDOM('mount', () => {
 
         let wrapper;
         const div = global.document.createElement('div');
+        const initialBodyChildren = document.body.childNodes.length;
         global.document.body.appendChild(div);
 
-        expect(document.body.childNodes).to.have.length(1);
+        expect(document.body.childNodes).to.have.length(initialBodyChildren + 1);
         expect(div.childNodes).to.have.length(0);
 
         wrapper = mount(<Foo />, { attachTo: div });
 
         expect(wrapper.find('.in-foo')).to.have.length(1);
-        expect(document.body.childNodes).to.have.length(1);
+        expect(document.body.childNodes).to.have.length(initialBodyChildren + 1);
         expect(div.childNodes).to.have.length(1);
 
         wrapper.detach();
@@ -2692,17 +2694,17 @@ describeWithDOM('mount', () => {
         wrapper = mount(<Bar />, { attachTo: div });
 
         expect(wrapper.find('.in-bar')).to.have.length(1);
-        expect(document.body.childNodes).to.have.length(1);
+        expect(document.body.childNodes).to.have.length(initialBodyChildren + 1);
         expect(div.childNodes).to.have.length(1);
 
         wrapper.detach();
 
-        expect(document.body.childNodes).to.have.length(1);
+        expect(document.body.childNodes).to.have.length(initialBodyChildren + 1);
         expect(div.childNodes).to.have.length(0);
 
         global.document.body.removeChild(div);
 
-        expect(document.body.childNodes).to.have.length(0);
+        expect(document.body.childNodes).to.have.length(initialBodyChildren + 0);
         expect(div.childNodes).to.have.length(0);
       });