diff --git a/common/lib/xmodule/xmodule/static_content.py b/common/lib/xmodule/xmodule/static_content.py
index 85855f831cbc..2c1622111c66 100755
--- a/common/lib/xmodule/xmodule/static_content.py
+++ b/common/lib/xmodule/xmodule/static_content.py
@@ -74,7 +74,7 @@ class VideoBlock(HTMLSnippet):
 
 def write_module_styles(output_root):
     """Write all registered XModule css, sass, and scss files to output root."""
-    return _write_styles('.xmodule_display', output_root, _list_modules(), 'get_preview_view_css')
+    return _write_styles('.xmodule_display', output_root, sorted(_list_modules(), key=str), 'get_preview_view_css')
 
 
 def write_module_js(output_root):
@@ -152,7 +152,8 @@ def _write_styles(selector, output_root, classes, css_attribute):
         "@import 'bourbon/bourbon';",
         "@import 'lms/theme/variables';",
     ]
-    for class_, fragment_names in css_imports.items():
+    for class_, fragment_names in sorted(css_imports.items()):
+        fragment_names = sorted(fragment_names)
         module_styles_lines.append("""{selector}.xmodule_{class_} {{""".format(
             class_=class_, selector=selector
         ))
diff --git a/openedx/core/djangoapps/theming/storage.py b/openedx/core/djangoapps/theming/storage.py
index 7d560819489a..d91cf99abf0e 100644
--- a/openedx/core/djangoapps/theming/storage.py
+++ b/openedx/core/djangoapps/theming/storage.py
@@ -10,7 +10,7 @@
 
 from django.conf import settings
 from django.contrib.staticfiles.finders import find
-from django.contrib.staticfiles.storage import CachedFilesMixin, StaticFilesStorage
+from django.contrib.staticfiles.storage import ManifestFilesMixin, StaticFilesStorage
 from django.utils._os import safe_join
 from django.utils.six.moves.urllib.parse import (  # pylint: disable=no-name-in-module, import-error
     unquote,
@@ -110,10 +110,10 @@ class ThemeStorage(ThemeMixin, StaticFilesStorage):
     pass
 
 
-class ThemeCachedFilesMixin(CachedFilesMixin):
+class ThemeManifestFilesMixin(ManifestFilesMixin):
     """
-    Comprehensive theme aware CachedFilesMixin.
-    Main purpose of subclassing CachedFilesMixin is to override the following methods.
+    Comprehensive theme aware ManifestFilesMixin.
+    Main purpose of subclassing ManifestFilesMixin is to override the following methods.
     1 - _url
     2 - url_converter
 
@@ -177,11 +177,11 @@ def _url(self, hashed_name_func, name, force=False, hashed_files=None):
         See the class docstring for more info.
         """
         processed_asset_name = self._processed_asset_name(name)
-        return super(ThemeCachedFilesMixin, self)._url(hashed_name_func, processed_asset_name, force, hashed_files)
+        return super(ThemeManifestFilesMixin, self)._url(hashed_name_func, processed_asset_name, force, hashed_files)
 
     def url_converter(self, name, hashed_files, template=None):
         """
-        This is an override of url_converter from CachedFilesMixin.
+        This is an override of url_converter from ManifestFilesMixin.
         It changes one line near the end of the method (see the NOTE) in order
         to return absolute urls instead of relative urls.  This behavior is
         necessary for theme overrides, as we get 404 on assets with relative
diff --git a/openedx/core/storage.py b/openedx/core/storage.py
index fefad2ee4a31..b5b61698e2ff 100644
--- a/openedx/core/storage.py
+++ b/openedx/core/storage.py
@@ -12,7 +12,7 @@
 from require.storage import OptimizedFilesMixin
 from storages.backends.s3boto3 import S3Boto3Storage
 
-from openedx.core.djangoapps.theming.storage import ThemeCachedFilesMixin, ThemePipelineMixin, ThemeMixin
+from openedx.core.djangoapps.theming.storage import ThemeManifestFilesMixin, ThemePipelineMixin, ThemeMixin
 
 
 class PipelineForgivingMixin(object):
@@ -44,7 +44,7 @@ class ProductionMixin(
         PipelineForgivingMixin,
         OptimizedFilesMixin,
         ThemePipelineMixin,
-        ThemeCachedFilesMixin,
+        ThemeManifestFilesMixin,
         ThemeMixin,
 ):
     """