diff --git a/app-misc/piper/piper-0.6.ebuild b/app-misc/piper/piper-0.6.ebuild
index f38e16d0446ff..bc683c50c6988 100644
--- a/app-misc/piper/piper-0.6.ebuild
+++ b/app-misc/piper/piper-0.6.ebuild
@@ -21,6 +21,11 @@ RESTRICT="!test? ( test )"
 BDEPEND="
 	${PYTHON_DEPS}
 	virtual/pkgconfig
+	test? (
+		$(python_gen_cond_dep '
+			dev-python/flake8[${PYTHON_USEDEP}]
+		')
+	)
 "
 RDEPEND="
 	${PYTHON_DEPS}