diff --git a/tests/fixtures/migration/new_cassette.json b/tests/fixtures/migration/new_cassette.json
index acf1267..ea7b4c2 100644
--- a/tests/fixtures/migration/new_cassette.json
+++ b/tests/fixtures/migration/new_cassette.json
@@ -15,14 +15,14 @@
                 "message": "OK", 
                 "code": 200
             }, 
-            "headers": [
-                "Access-Control-Allow-Origin: *\r\n", 
-                "Content-Type: application/json\r\n", 
-                "Date: Mon, 21 Apr 2014 23:13:40 GMT\r\n", 
-                "Server: gunicorn/0.17.4\r\n", 
-                "Content-Length: 32\r\n", 
-                "Connection: keep-alive\r\n"
-            ], 
+            "headers": {
+                "Access-Control-Allow-Origin": ["*"],
+                "Content-Type": ["application/json"],
+                "Date": ["Mon, 21 Apr 2014 23:13:40 GMT"],
+                "Server": ["gunicorn/0.17.4"],
+                "Content-Length": ["32"],
+                "Connection": ["keep-alive"]
+            }, 
             "body": {
                 "string": "{\n  \"origin\": \"217.122.164.194\"\n}"
             }
diff --git a/tests/fixtures/migration/new_cassette.yaml b/tests/fixtures/migration/new_cassette.yaml
index 58d19ea..ea37459 100644
--- a/tests/fixtures/migration/new_cassette.yaml
+++ b/tests/fixtures/migration/new_cassette.yaml
@@ -8,8 +8,11 @@
     uri: http://httpbin.org/ip
   response:
     body: {string: !!python/unicode "{\n  \"origin\": \"217.122.164.194\"\n}"}
-    headers: [!!python/unicode "Access-Control-Allow-Origin: *\r\n", !!python/unicode "Content-Type:
-        application/json\r\n", !!python/unicode "Date: Mon, 21 Apr 2014 23:06:09 GMT\r\n",
-      !!python/unicode "Server: gunicorn/0.17.4\r\n", !!python/unicode "Content-Length:
-        32\r\n", !!python/unicode "Connection: keep-alive\r\n"]
+    headers:
+      Access-Control-Allow-Origin: ['*']
+      Content-Type: [application/json]
+      Date: ['Mon, 21 Apr 2014 23:06:09 GMT']
+      Server: [gunicorn/0.17.4]
+      Content-Length: ['32']
+      Connection: [keep-alive]
     status: {code: 200, message: OK}