diff --git a/var/spack/repos/builtin/packages/dcap/package.py b/var/spack/repos/builtin/packages/dcap/package.py
index 91a083f3a36..24220622235 100644
--- a/var/spack/repos/builtin/packages/dcap/package.py
+++ b/var/spack/repos/builtin/packages/dcap/package.py
@@ -28,6 +28,8 @@ class Dcap(AutotoolsPackage):
     depends_on("libxcrypt")
     depends_on("zlib-api")
 
+    depends_on("cunit", type="test")
+
     variant("plugins", default=True, description="Build plugins")
 
     def patch(self):