diff --git a/.travis.yml b/.travis.yml
index 09218b17..77b52ef5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,6 +13,7 @@ sudo: false
 install:
   - "pip install 'argparse>=1.2.1' --allow-all-external"
   - pip install boto certauth
+  - pip install git+https://github.com/esnme/ultrajson.git
   - python setup.py -q install
   - pip install coverage pytest-cov coveralls --use-mirrors
 
diff --git a/pywb/warc/cdxindexer.py b/pywb/warc/cdxindexer.py
index 819194ae..122df7f4 100644
--- a/pywb/warc/cdxindexer.py
+++ b/pywb/warc/cdxindexer.py
@@ -3,10 +3,22 @@ import sys
 
 # Use ujson if available
 try:
-    from ujson import dumps as json_encode
-except:
-    from json import dumps as json_encode
+    from ujson import dumps as ujson_dumps
 
+    try:
+        assert (ujson_dumps('http://example.com/',
+                            escape_forward_slashes=False) ==
+                '"http://example.com/"')
+    except Exception as e:  # pragma: no cover
+        sys.stderr.write('ujson w/o forward-slash escaping not available,\
+defaulting to regular json\n')
+        raise
+
+    def json_encode(obj):
+        return ujson_dumps(obj, escape_forward_slashes=False)
+
+except:  # pragma: no cover
+    from json import dumps as json_encode
 
 try:  # pragma: no cover
     from collections import OrderedDict
diff --git a/pywb/warc/test/test_indexing.py b/pywb/warc/test/test_indexing.py
index df8dd385..bb3f110e 100644
--- a/pywb/warc/test/test_indexing.py
+++ b/pywb/warc/test/test_indexing.py
@@ -8,12 +8,6 @@ com,example)/?example=1 20140103030321 http://example.com?example=1 text/html 20
 com,example)/?example=1 20140103030341 http://example.com?example=1 warc/revisit - B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A - - 553 1864 example.warc.gz
 org,iana)/domains/example 20140128051539 http://www.iana.org/domains/example text/html 302 JZ622UA23G5ZU6Y3XAKH4LINONUEICEG - - 577 2907 example.warc.gz
 
-# warc.gz -- minimal CDXJ
->>> print_cdx_index('example.warc.gz', minimal=True, cdxj=True)
-com,example)/?example=1 20140103030321 {"url": "http://example.com?example=1", "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A", "length": "1043", "offset": "333", "filename": "example.warc.gz"}
-com,example)/?example=1 20140103030341 {"url": "http://example.com?example=1", "mime": "warc/revisit", "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A", "length": "553", "offset": "1864", "filename": "example.warc.gz"}
-org,iana)/domains/example 20140128051539 {"url": "http://www.iana.org/domains/example", "digest": "JZ622UA23G5ZU6Y3XAKH4LINONUEICEG", "length": "577", "offset": "2907", "filename": "example.warc.gz"}
-
 # warc.gz -- parse all
 >>> print_cdx_index('example.warc.gz', include_all=True)
  CDX N b a m s k r M S V g
@@ -23,14 +17,6 @@ com,example)/?example=1 20140103030341 http://example.com?example=1 warc/revisit
 com,example)/?example=1 20140103030341 http://example.com?example=1 - - - - - 490 2417 example.warc.gz
 org,iana)/domains/example 20140128051539 http://www.iana.org/domains/example text/html 302 JZ622UA23G5ZU6Y3XAKH4LINONUEICEG - - 577 2907 example.warc.gz
 
-# warc.gz -- parse all -- CDXJ
->>> print_cdx_index('example.warc.gz', include_all=True, cdxj=True)
-com,example)/?example=1 20140103030321 {"url": "http://example.com?example=1", "mime": "text/html", "status": "200", "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A", "length": "1043", "offset": "333", "filename": "example.warc.gz"}
-com,example)/?example=1 20140103030321 {"url": "http://example.com?example=1", "length": "488", "offset": "1376", "filename": "example.warc.gz"}
-com,example)/?example=1 20140103030341 {"url": "http://example.com?example=1", "mime": "warc/revisit", "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A", "length": "553", "offset": "1864", "filename": "example.warc.gz"}
-com,example)/?example=1 20140103030341 {"url": "http://example.com?example=1", "length": "490", "offset": "2417", "filename": "example.warc.gz"}
-org,iana)/domains/example 20140128051539 {"url": "http://www.iana.org/domains/example", "mime": "text/html", "status": "302", "digest": "JZ622UA23G5ZU6Y3XAKH4LINONUEICEG", "length": "577", "offset": "2907", "filename": "example.warc.gz"}
-
 # warc
 >>> print_cdx_index('example.warc')
  CDX N b a m s k r M S V g
@@ -52,14 +38,6 @@ org,iana)/domains/example 20140128051539 http://www.iana.org/domains/example tex
  CDX N b a m s k r M S V g
 com,example)/ 20140216050221 http://example.com/ text/html 200 B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A - - 856 171 example.arc.gz
 
-# arc.gz -- json
->>> print_cdx_index('example.arc.gz', cdxj=True)
-com,example)/ 20140216050221 {"url": "http://example.com/", "mime": "text/html", "status": "200", "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A", "length": "856", "offset": "171", "filename": "example.arc.gz"}
-
-# arc.gz -- minimal + json
->>> print_cdx_index('example.arc.gz', cdxj=True, minimal=True)
-com,example)/ 20140216050221 {"url": "http://example.com/", "digest": "PEWDX5GTH66WU74WBPGFECIYBMPMP3FP", "length": "856", "offset": "171", "filename": "example.arc.gz"}
-
 # arc
 >>> print_cdx_index('example.arc')
  CDX N b a m s k r M S V g
@@ -210,6 +188,8 @@ from pywb import get_test_dir
 
 from pywb.warc.cdxindexer import write_cdx_index, main, cdx_filename
 
+from pywb.cdx.cdxobject import CDXObject
+
 from io import BytesIO
 import sys
 
@@ -302,6 +282,54 @@ def test_non_chunked_gzip_err():
         print_cdx_index('example-bad.warc.gz.bad')
 
 
+def parse_cdxj(string):
+    lines = string.split('\n')
+    if lines[0] == '':
+        lines = lines[1:]
+    cdxlist = map(CDXObject, lines)
+    return map(dict, cdxlist)
+
+
+def test_cdxj_warc_minimal():
+    # cdxj minimal
+    res = cdx_index('example.warc.gz', minimal=True, cdxj=True)
+
+    assert parse_cdxj(res) == parse_cdxj("""
+com,example)/?example=1 20140103030321 {"url": "http://example.com?example=1", "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A", "length": "1043", "offset": "333", "filename": "example.warc.gz"}
+com,example)/?example=1 20140103030341 {"url": "http://example.com?example=1", "mime": "warc/revisit", "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A", "length": "553", "offset": "1864", "filename": "example.warc.gz"}
+org,iana)/domains/example 20140128051539 {"url": "http://www.iana.org/domains/example", "digest": "JZ622UA23G5ZU6Y3XAKH4LINONUEICEG", "length": "577", "offset": "2907", "filename": "example.warc.gz"}
+""")
+
+
+def test_cdxj_warc_all():
+    # warc.gz -- parse all -- CDXJ
+    res = cdx_index('example.warc.gz', include_all=True, cdxj=True)
+
+    assert parse_cdxj(res) == parse_cdxj("""
+com,example)/?example=1 20140103030321 {"url": "http://example.com?example=1", "mime": "text/html", "status": "200", "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A", "length": "1043", "offset": "333", "filename": "example.warc.gz"}
+com,example)/?example=1 20140103030321 {"url": "http://example.com?example=1", "length": "488", "offset": "1376", "filename": "example.warc.gz"}
+com,example)/?example=1 20140103030341 {"url": "http://example.com?example=1", "mime": "warc/revisit", "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A", "length": "553", "offset": "1864", "filename": "example.warc.gz"}
+com,example)/?example=1 20140103030341 {"url": "http://example.com?example=1", "length": "490", "offset": "2417", "filename": "example.warc.gz"}
+org,iana)/domains/example 20140128051539 {"url": "http://www.iana.org/domains/example", "mime": "text/html", "status": "302", "digest": "JZ622UA23G5ZU6Y3XAKH4LINONUEICEG", "length": "577", "offset": "2907", "filename": "example.warc.gz"}
+""")
+
+def test_cdxj_arc():
+    # arc.gz -- json
+    res = cdx_index('example.arc.gz', cdxj=True)
+    assert parse_cdxj(res) == parse_cdxj("""
+com,example)/ 20140216050221 {"url": "http://example.com/", "mime": "text/html", "status": "200", "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A", "length": "856", "offset": "171", "filename": "example.arc.gz"}
+""")
+
+def test_cdxj_arc_minimal():
+    # arc.gz -- minimal + json
+    res = cdx_index('example.arc.gz', cdxj=True, minimal=True)
+    assert parse_cdxj(res) == parse_cdxj("""
+com,example)/ 20140216050221 {"url": "http://example.com/", "digest": "PEWDX5GTH66WU74WBPGFECIYBMPMP3FP", "length": "856", "offset": "171", "filename": "example.arc.gz"}
+""")
+
+
+
+
 if __name__ == "__main__":
     import doctest
     doctest.testmod()
diff --git a/tests/test_auto_colls.py b/tests/test_auto_colls.py
index 72291f88..e79d1269 100644
--- a/tests/test_auto_colls.py
+++ b/tests/test_auto_colls.py
@@ -16,6 +16,7 @@ from pywb.manager.manager import main
 import pywb.manager.autoindex
 
 from pywb.warc.cdxindexer import main as cdxindexer_main
+from pywb.cdx.cdxobject import CDXObject
 
 from pywb import get_test_dir
 from pywb.framework.wsgi_wrappers import init_app
@@ -457,7 +458,11 @@ class TestManagedColls(object):
         assert all(x.endswith('.cdxj') for x in cdxjs)
 
         with open(os.path.join(migrate_dir, 'iana.cdxj')) as fh:
-            assert fh.readline().startswith('org,iana)/ 20140126200624 {"url": "http://www.iana.org/",')
+            cdx = CDXObject(fh.readline())
+            assert cdx['urlkey'] == 'org,iana)/'
+            assert cdx['timestamp'] == '20140126200624'
+            assert cdx['url'] == 'http://www.iana.org/'
+            #assert fh.readline().startswith('org,iana)/ 20140126200624 {"url": "http://www.iana.org/",')
 
         # Nothing else to migrate
         main(['cdx-convert', migrate_dir])