diff --git a/debian/tests/control b/debian/tests/control
index a275b1e7..9ef42f09 100644
--- a/debian/tests/control
+++ b/debian/tests/control
@@ -1,3 +1,3 @@
 Test-Command: bash -v ./debian/qualify-clang.sh
-Depends: @, cmake, g++
+Depends: @, cmake, g++, file
 Restrictions: allow-stderr