diff --git a/pywb/recorder/test/test_recorder.py b/pywb/recorder/test/test_recorder.py
index 80b329d91..6cc6e8895 100644
--- a/pywb/recorder/test/test_recorder.py
+++ b/pywb/recorder/test/test_recorder.py
@@ -262,7 +262,7 @@ def test_record_skip_wrong_coll(self):
 
         resp = self._test_warc_write(recorder_app, 'httpbin.org', '/get?foo=bar')
         assert b'HTTP/1.1 200 OK' in resp.body
-        assert b'"foo":"bar"' in resp.body
+        assert b'"foo": "bar"' in resp.body
 
         self._test_all_warcs('/warcs/', 2)
 
@@ -542,7 +542,7 @@ def test_record_multiple_writes_rollover_idle(self):
                             '/get?goo=bar', '&param.recorder.coll=GOO')
 
         assert b'HTTP/1.1 200 OK' in resp.body
-        assert b'"goo":"bar"' in resp.body
+        assert b'"goo": "bar"' in resp.body
 
         self._test_all_warcs('/warcs/GOO/', 2)
 
diff --git a/pywb/warcserver/test/test_handlers.py b/pywb/warcserver/test/test_handlers.py
index ee8be49f1..74a4a0a94 100644
--- a/pywb/warcserver/test/test_handlers.py
+++ b/pywb/warcserver/test/test_handlers.py
@@ -162,7 +162,7 @@ def test_live_resource(self):
         assert resp.headers['Memento-Datetime'] != ''
 
         assert b'HTTP/1.1 200 OK' in resp.body
-        assert b'"foo":"bar"' in resp.body
+        assert b'"foo": "bar"' in resp.body
 
         assert 'ResErrors' not in resp.headers
 
@@ -178,7 +178,7 @@ def test_live_post_resource(self):
         assert resp.headers['Memento-Datetime'] != ''
 
         assert b'HTTP/1.1 200 OK' in resp.body
-        assert b'"foo":"bar"' in resp.body
+        assert b'"foo": "bar"' in resp.body
 
         assert 'ResErrors' not in resp.headers
 
@@ -288,7 +288,7 @@ def test_agg_live_postreq(self):
         assert resp.headers['Memento-Datetime'] != ''
 
         assert b'HTTP/1.1 200 OK' in resp.body
-        assert b'"foo":"bar"' in resp.body
+        assert b'"foo": "bar"' in resp.body
 
         #assert json.loads(resp.headers['ResErrors']) == {"rhiz": "NotFoundException('https://webenact.rhizome.org/vvork/http://httpbin.org/get?foo=bar',)"}
         assert "NotFoundException('https://webenact.rhizome.org/vvork/" in json.loads(resp.headers['ResErrors'])['rhiz']
diff --git a/tests/test_live_rewriter.py b/tests/test_live_rewriter.py
index 25891e500..ab022d26c 100644
--- a/tests/test_live_rewriter.py
+++ b/tests/test_live_rewriter.py
@@ -76,14 +76,14 @@ def test_live_live_post(self, fmod_sl):
         resp = self.post('/live/{0}httpbin.org/post', fmod_sl, {'foo': 'bar', 'test': 'abc'})
         assert resp.status_int == 200
         resp.charset = 'utf-8'
-        assert '"foo" :"bar"' in resp.text
-        assert '"test" :"abc"' in resp.text
+        assert '"foo": "bar"' in resp.text
+        assert '"test": "abc"' in resp.text
         assert resp.status_int == 200
 
     def test_live_anchor_encode(self, fmod_sl):
         resp = self.get('/live/{0}httpbin.org/get?val=abc%23%23xyz', fmod_sl)
         assert 'get?val=abc%23%23xyz"' in resp.text
-        assert '"val" :"abc##xyz"' in resp.text
+        assert '"val": "abc##xyz"' in resp.text
         #assert '"http://httpbin.org/anything/abc##xyz"' in resp.text
         assert resp.status_int == 200
 
@@ -181,7 +181,7 @@ def test_live_video_info(self):
 
     def test_deflate(self, fmod_sl):
         resp = self.get('/live/{0}http://httpbin.org/deflate', fmod_sl)
-        assert b'"deflated" :true' in resp.body
+        assert b'"deflated": true' in resp.body
 
     def test_live_origin_and_referrer(self, fmod_sl):
         headers = {'Referer': 'http://localhost:80/live/{0}http://example.com/test'.format(fmod_sl),