diff --git a/.travis.yml b/.travis.yml
index 87283bf8..90f1ea94 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,16 +2,6 @@ sudo: false
 language: python
 matrix:
   include:
-    - python: 3.5
-      dist: xenial
-      env: TOX_ENV=flake8
-    - python: 3.5
-      dist: xenial
-      env: TOX_ENV=py37-django22
-    - python: 3.5
-      dist: xenial
-      env: TOX_ENV=py37-django30
-
     - python: 3.6
       dist: xenial
       env: TOX_ENV=flake8
diff --git a/docs/conf.py b/docs/conf.py
index 5dbead12..1e658949 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -36,7 +36,7 @@
 # General substitutions.
 project = "django-tinymce"
 authors = "Joost Cassee, Aljosa Mohorovic"
-copyright = "2008-2016, %s" % authors
+copyright = f"2008-2016, {authors}"
 
 # The default replacements for |version| and |release|, also used in various
 # other places throughout the built documents.
@@ -88,7 +88,7 @@
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
-html_title = "%s %s documentation" % (project, version)
+html_title = f"{project} {version} documentation"
 
 # A shorter title for the navigation bar.  Default is the same as html_title.
 # html_short_title = None
@@ -143,7 +143,7 @@
 html_file_suffix = '.html'
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = '%sdoc' % project
+htmlhelp_basename = f'{project}doc'
 
 
 # Options for LaTeX output
@@ -158,7 +158,7 @@
 # Grouping the document tree into LaTeX files. List of tuples (source
 # start file, target name, title, author, document class [howto/manual]).
 latex_documents = [
-    (master_doc, '%s.tex' % project, '%s Documentation' % project,
+    (master_doc, f'{project}.tex', f'{project} Documentation',
      authors, 'manual'),
 ]
 
diff --git a/testtinymce/urls.py b/testtinymce/urls.py
index e2bf7d77..d76bd85c 100644
--- a/testtinymce/urls.py
+++ b/testtinymce/urls.py
@@ -1,4 +1,3 @@
-from django.conf import settings
 from django.contrib.staticfiles.urls import staticfiles_urlpatterns
 from django.contrib import admin
 from django.conf.urls import include, url
@@ -10,8 +9,6 @@
 urlpatterns = [
     url(r'^tinymce/', include(tinymce.urls)),
     url(r'^admin/', admin.site.urls),
-    #url(r'^%s(?P<path>.*)$' % settings.MEDIA_URL[1:], 
-    #    'django.views.static.serve', {"document_root": settings.MEDIA_ROOT}),
 ]
 
 urlpatterns += staticfiles_urlpatterns()
diff --git a/tox.ini b/tox.ini
index 2d94e46f..f35576e8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,5 @@
 [tox]
 envlist =
-    py35-django{22,30},
     py36-django{22,30},
     py37-django{22,30},
     py38-django{22,30},