diff --git a/dev-python/arrow/arrow-0.15.5.ebuild b/dev-python/arrow/arrow-0.15.5.ebuild
index 2c705f6d9bdea..073d58db855b4 100644
--- a/dev-python/arrow/arrow-0.15.5.ebuild
+++ b/dev-python/arrow/arrow-0.15.5.ebuild
@@ -20,6 +20,7 @@ RDEPEND="
 BDEPEND="
 	test? (
 		dev-python/chai[${PYTHON_USEDEP}]
+		dev-python/mock[${PYTHON_USEDEP}]
 		dev-python/simplejson[${PYTHON_USEDEP}]
 	)"