diff --git a/requirements/development.in b/requirements/development.in
--- a/requirements/development.in
+++ b/requirements/development.in
@@ -22,9 +22,6 @@
 # Used for generating test code coverage report.
 coverage~=4.4.0
 
-# Convenience test runner tailored for running Django tests.
-django-discover-runner~=0.3.0
-
 # Used for dynamic generation of fixture data in tests.
 factory_boy~=2.1.0
 
@@ -32,4 +29,7 @@ factory_boy~=2.1.0
 mock~=1.3.0
 
 # Used for building documentation.
-sphinx~=1.6.0
\ No newline at end of file
+sphinx~=1.6.0
+
+# Used for handling of timezones.
+pytz
\ No newline at end of file