diff --git a/MANIFEST.in b/MANIFEST.in
index 7e67e4b..adbca79 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,5 @@
 include Makefile
 include requirements.txt
+include test-requirements.txt
 include *.rst
 include doc/conf.py doc/*.rst