diff --git a/packages/react/test/router-custom.js b/packages/react/test/router-custom.js
index 5b40d0e..8a4df76 100644
--- a/packages/react/test/router-custom.js
+++ b/packages/react/test/router-custom.js
@@ -2,7 +2,7 @@ import {expect} from 'chai';
 
 import {withWeb} from '@flecks/headless/test/helpers/with-web';
 
-it('allows custom routes', withWeb(
+it('allows custom routes', 'undefined' !== typeof Headers && withWeb(
   async ({page, response}) => {
     expect(response)
       .to.not.be.null;
diff --git a/packages/react/test/router-data.js b/packages/react/test/router-data.js
index 9f2c71b..f4d50d0 100644
--- a/packages/react/test/router-data.js
+++ b/packages/react/test/router-data.js
@@ -2,7 +2,7 @@ import {expect} from 'chai';
 
 import {withWeb} from '@flecks/headless/test/helpers/with-web';
 
-it('implements data router', withWeb(
+it('implements data router', 'undefined' !== typeof Headers && withWeb(
   async ({page, response}) => {
     expect(response)
       .to.not.be.null;
@@ -26,7 +26,7 @@ it('implements data router', withWeb(
   },
 ));
 
-it('implements data router with ssr', withWeb(
+it('implements data router with ssr', 'undefined' !== typeof Headers && withWeb(
   async ({page, response}) => {
     expect(response)
       .to.not.be.null;
diff --git a/packages/react/test/router-default.js b/packages/react/test/router-default.js
index 4bde0df..44aabd4 100644
--- a/packages/react/test/router-default.js
+++ b/packages/react/test/router-default.js
@@ -2,7 +2,7 @@ import {expect} from 'chai';
 
 import {withWeb} from '@flecks/headless/test/helpers/with-web';
 
-it('provides default routes', withWeb(
+it('provides default routes', 'undefined' !== typeof Headers && withWeb(
   async ({page, response}) => {
     expect(response)
       .to.not.be.null;
@@ -17,7 +17,7 @@ it('provides default routes', withWeb(
   },
 ));
 
-it('provides default routes with ssr', withWeb(
+it('provides default routes with ssr', 'undefined' !== typeof Headers && withWeb(
   async ({page, response}) => {
     expect(response)
       .to.not.be.null;
diff --git a/packages/react/test/router-lazy.js b/packages/react/test/router-lazy.js
index fb1d738..9f0239f 100644
--- a/packages/react/test/router-lazy.js
+++ b/packages/react/test/router-lazy.js
@@ -2,7 +2,7 @@ import {expect} from 'chai';
 
 import {withWeb} from '@flecks/headless/test/helpers/with-web';
 
-it('allows lazy routes', withWeb(
+it('allows lazy routes', 'undefined' !== typeof Headers && withWeb(
   async ({page, response}) => {
     expect(response)
       .to.not.be.null;