diff --git a/dune-project b/dune-project
index 107d269d..5361d5ea 100644
--- a/dune-project
+++ b/dune-project
@@ -75,6 +75,7 @@
    (and
     (>= "1.0")
     (< "2.0")))
+  (eio_main :with-test)
   ("lsp"
    (and
     (>= "1.17")
diff --git a/linol-eio.opam b/linol-eio.opam
index 4b9f0d60..7416d2a6 100644
--- a/linol-eio.opam
+++ b/linol-eio.opam
@@ -12,6 +12,7 @@ depends: [
   "linol" {= version}
   "base-unix"
   "eio" {>= "1.0" & < "2.0"}
+  "eio_main" {with-test}
   "lsp" {>= "1.17" & < "1.18"}
   "jsonrpc" {>= "1.17" & < "1.18"}
   "odoc" {with-doc}