diff --git a/tests/flake.lock b/tests/flake.lock
index 05b843a0..900734cc 100644
--- a/tests/flake.lock
+++ b/tests/flake.lock
@@ -44,6 +44,22 @@
         "type": "indirect"
       }
     },
+    "nixpkgs-stable": {
+      "locked": {
+        "lastModified": 1664790708,
+        "narHash": "sha256-fzxmpOPjzOVIt9KeDN4EDPI13xJn+u0uMxheKCWken8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "81a3237b64e67b66901c735654017e75f0c50943",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-22.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs_2": {
       "locked": {
         "lastModified": 1661353537,
@@ -66,12 +82,12 @@
       },
       "locked": {
         "lastModified": 0,
-        "narHash": "sha256-C4eH2MjSU1/DPGxlCA7qvFssE6LgTLZ5CitdhFmiUfo=",
-        "path": "/nix/store/za0r3rgi5ypsl3cnzxpi82ad5cvvyvva-source",
+        "narHash": "sha256-oAI8i2Y3wSyvfkNe/1VgeE6/BRtMGTQtHyYGxMo5DQo=",
+        "path": "/nix/store/bdzif6mvmzrhl01j20a1926c6jfq9szl-source",
         "type": "path"
       },
       "original": {
-        "path": "/nix/store/za0r3rgi5ypsl3cnzxpi82ad5cvvyvva-source",
+        "path": "/nix/store/bdzif6mvmzrhl01j20a1926c6jfq9szl-source",
         "type": "path"
       }
     },
@@ -95,6 +111,7 @@
       "inputs": {
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-stable": "nixpkgs-stable",
         "nixvim": "nixvim"
       }
     }
diff --git a/tests/flake.nix b/tests/flake.nix
index ee8ea166..bc40e348 100644
--- a/tests/flake.nix
+++ b/tests/flake.nix
@@ -4,12 +4,16 @@
   inputs.flake-utils.url = "github:numtide/flake-utils";
   inputs.nixvim.url = "./..";
 
-  outputs = { self, nixvim, nixpkgs, flake-utils, ... }:
+  inputs.nixpkgs-stable.url = "github:NixOS/nixpkgs/nixos-22.05";
+
+  outputs = { self, nixvim, nixpkgs, flake-utils, nixpkgs-stable, ... }:
     (flake-utils.lib.eachDefaultSystem
       (system:
         let
           pkgs = import nixpkgs { inherit system; };
+          pkgs-stable = import nixpkgs-stable { inherit system; };
           build = nixvim.build pkgs;
+          build-stable = nixvim.build pkgs-stable;
         in
         rec {
           # A plain nixvim configuration
@@ -45,7 +49,7 @@
               };
             };
 
-            issue-40 = build {
+            issue-40 = build-stable {
               plugins = {
                 nix.enable = true;
                 nvim-autopairs.enable = true;