diff --git a/test/setup.js b/test/setup.js
index 62f3903..ba5c70a 100644
--- a/test/setup.js
+++ b/test/setup.js
@@ -49,7 +49,7 @@ nock('http://example.com')
 
   .get('/redirecttarget')
   .reply(200, 'redirect target', {
-    'Some header': 'value'
+    'Some-header': 'value'
   })
 
   .head('/redirect')
diff --git a/test/test-memory.js b/test/test-memory.js
index 4def37a..440db1c 100644
--- a/test/test-memory.js
+++ b/test/test-memory.js
@@ -59,7 +59,7 @@ describe('memory usage', function() {
         cors_api_url + 'http://127.0.0.1:' + server.address().port);
     request.agent = false; // Force Connection: Close
     request.headers = {
-      'Long header': new Array(requestSize * 1e3).join('x'),
+      'Long-header': new Array(requestSize * 1e3).join('x'),
     };
     (function requestAgain() {
       if (remaining-- === 0) {
diff --git a/test/test.js b/test/test.js
index 667bfb8..8085227 100644
--- a/test/test.js
+++ b/test/test.js
@@ -142,11 +142,11 @@ describe('Basic functionality', function() {
       .head('/example.com/redirect')
       .redirects(0)
       .expect('Access-Control-Allow-Origin', '*')
-      .expect('some header', 'value')
+      .expect('some-header', 'value')
       .expect('x-request-url', 'http://example.com/redirect')
       .expect('x-cors-redirect-1', '302 http://example.com/redirecttarget')
       .expect('x-final-url', 'http://example.com/redirecttarget')
-      .expect('access-control-expose-headers', /some header,x-final-url/)
+      .expect('access-control-expose-headers', /some-header,x-final-url/)
       .expectNoHeader('header at redirect')
       .expect(200, '', done);
   });
@@ -156,11 +156,11 @@ describe('Basic functionality', function() {
       .get('/example.com/redirect')
       .redirects(0)
       .expect('Access-Control-Allow-Origin', '*')
-      .expect('some header', 'value')
+      .expect('some-header', 'value')
       .expect('x-request-url', 'http://example.com/redirect')
       .expect('x-cors-redirect-1', '302 http://example.com/redirecttarget')
       .expect('x-final-url', 'http://example.com/redirecttarget')
-      .expect('access-control-expose-headers', /some header,x-final-url/)
+      .expect('access-control-expose-headers', /some-header,x-final-url/)
       .expectNoHeader('header at redirect')
       .expect(200, 'redirect target', done);
   });