diff --git a/packages/mustache-cli/mustache-cli.3.3.0/opam b/packages/mustache-cli/mustache-cli.3.3.0/opam
index dfe551a79875..e3282258eacb 100644
--- a/packages/mustache-cli/mustache-cli.3.3.0/opam
+++ b/packages/mustache-cli/mustache-cli.3.3.0/opam
@@ -16,6 +16,7 @@ homepage: "https://github.com/rgrinberg/ocaml-mustache"
 bug-reports: "https://github.com/rgrinberg/ocaml-mustache/issues"
 depends: [
   "dune" {>= "2.7"}
+  "ezjsonm" {with-test}
   "jsonm" {>= "1.0.1"}
   "mustache" {= version}
   "cmdliner" {>= "1.1.0"}
diff --git a/packages/mustache/mustache.3.3.0/opam b/packages/mustache/mustache.3.3.0/opam
index 2a821dbe88fb..f51c47743c94 100644
--- a/packages/mustache/mustache.3.3.0/opam
+++ b/packages/mustache/mustache.3.3.0/opam
@@ -17,6 +17,7 @@ depends: [
   "dune" {>= "2.7"}
   "ounit2" {with-test}
   "ezjsonm" {with-test}
+  "mustache" {= version & with-test}
   "menhir" {>= "20180703"}
   "ocaml" {>= "4.08"}
   "odoc" {with-doc}