diff --git a/dune-project b/dune-project
index 4ba4464..c77ebaa 100644
--- a/dune-project
+++ b/dune-project
@@ -1,4 +1,4 @@
-(lang dune 3.9)
+(lang dune 3.15)
 
 (using menhir 2.1)
 
diff --git a/mlx.opam b/mlx.opam
index fddd054..aef4fc8 100644
--- a/mlx.opam
+++ b/mlx.opam
@@ -9,7 +9,7 @@ bug-reports: "https://github.com/ocaml-mlx/mlx/issues"
 depends: [
   "ocaml" {>= "4.14.0"}
   "ppxlib"
-  "dune" {>= "3.9"}
+  "dune" {>= "3.15"}
   "menhir" {= "20210419" & with-dev-setup}
   "ocamlformat" {with-dev-setup}
   "odoc" {with-doc}
@@ -25,7 +25,6 @@ build: [
     jobs
     "--promote-install-files=false"
     "@install"
-    "@runtest" {with-test}
     "@doc" {with-doc}
   ]
   ["dune" "install" "-p" name "--create-install-files" name]
diff --git a/ocamlmerlin-mlx.opam b/ocamlmerlin-mlx.opam
index 0f29a3f..3760735 100644
--- a/ocamlmerlin-mlx.opam
+++ b/ocamlmerlin-mlx.opam
@@ -9,7 +9,7 @@ bug-reports: "https://github.com/ocaml-mlx/mlx/issues"
 depends: [
   "ocaml" {>= "4.14.0"}
   "ppxlib"
-  "dune" {>= "3.9"}
+  "dune" {>= "3.15"}
   "merlin-lib"
   "cppo"
   "csexp" {with-dev-setup}
@@ -26,7 +26,6 @@ build: [
     "-j"
     jobs
     "@install"
-    "@runtest" {with-test}
     "@doc" {with-doc}
   ]
 ]