diff --git a/cachet-solo5.opam b/cachet-solo5.opam
index ed57829..22a3239 100644
--- a/cachet-solo5.opam
+++ b/cachet-solo5.opam
@@ -16,8 +16,9 @@ build: [ "dune" "build" "-p" name "-j" jobs ]
 run-test: [ "dune" "runtest" "-p" name "-j" jobs ]
 
 depends: [
-  "ocaml"       {>= "4.14.0"}
-  "dune"        {>= "3.5.0"}
-  "cachet"      {= version}
+  "ocaml"        {>= "4.14.0"}
+  "dune"         {>= "3.5.0"}
+  "cachet"       {= version}
   "mirage-solo5" {>= "0.7.0"}
+  "alcotest"     {with-test & >= "1.8.0"}
 ]