diff --git a/releasenotes/notes/add-content-type-without-spaces-b2c9b91b257814f3.yaml b/releasenotes/notes/add-content-type-without-spaces-b2c9b91b257814f3.yaml
new file mode 100644
index 0000000..0075a36
--- /dev/null
+++ b/releasenotes/notes/add-content-type-without-spaces-b2c9b91b257814f3.yaml
@@ -0,0 +1,9 @@
+---
+upgrade:
+  - The ``JSON_ENC`` and ``TXT_ENC`` option in the ``_error_checker``
+    section have been added with additional content-type which are
+    defined in RFC7231 but missing in the currnt rest_client.py file.
+    The lack of these additional content-type will cause defcore test
+    to fail for OpenStack public cloud which uses tomcat module in the
+    api gateway. The additions are ``application/json;charset=utf-8``,
+    ``text/html;charset=utf-8``,``text/plain;charset=utf-8``
\ No newline at end of file
diff --git a/tempest/lib/common/rest_client.py b/tempest/lib/common/rest_client.py
index f5bff20..3cd1453 100644
--- a/tempest/lib/common/rest_client.py
+++ b/tempest/lib/common/rest_client.py
@@ -731,12 +731,21 @@
         if resp.status < 400:
             return
 
-        JSON_ENC = ['application/json', 'application/json; charset=utf-8']
+        # NOTE(zhipengh): There is a purposefully duplicate of content-type
+        # with the only difference is with or without spaces, as specified
+        # in RFC7231.
+        JSON_ENC = ['application/json', 'application/json; charset=utf-8',
+                    'application/json;charset=utf-8']
+
         # NOTE(mtreinish): This is for compatibility with Glance and swift
         # APIs. These are the return content types that Glance api v1
         # (and occasionally swift) are using.
+        # NOTE(zhipengh): There is a purposefully duplicate of content-type
+        # with the only difference is with or without spaces, as specified
+        # in RFC7231.
         TXT_ENC = ['text/plain', 'text/html', 'text/html; charset=utf-8',
-                   'text/plain; charset=utf-8']
+                   'text/plain; charset=utf-8', 'text/html;charset=utf-8',
+                   'text/plain;charset=utf-8']
 
         if ctype.lower() in JSON_ENC:
             parse_resp = True