diff --git a/tests/modules/misc/nix/empty-settings.nix b/tests/modules/misc/nix/empty-settings.nix
index 7e5844742..4ca5e4b0b 100644
--- a/tests/modules/misc/nix/empty-settings.nix
+++ b/tests/modules/misc/nix/empty-settings.nix
@@ -1,14 +1,10 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
+{ config, ... }:
 
 {
-  config = {
-    nix = { package = config.lib.test.mkStubPackage { }; };
+  nix = { package = config.lib.test.mkStubPackage { }; };
 
-    nmt.script = ''
-      assertPathNotExists home-files/.config/nix
-      assertPathNotExists home-files/.nix-defexpr/50-home-manager
-    '';
-  };
+  nmt.script = ''
+    assertPathNotExists home-files/.config/nix
+    assertPathNotExists home-files/.nix-defexpr/50-home-manager
+  '';
 }
diff --git a/tests/modules/misc/nix/example-channels-xdg.nix b/tests/modules/misc/nix/example-channels-xdg.nix
index 8ca1569f3..f50d0b461 100644
--- a/tests/modules/misc/nix/example-channels-xdg.nix
+++ b/tests/modules/misc/nix/example-channels-xdg.nix
@@ -9,21 +9,19 @@ let
     }
   '';
 in {
-  config = {
-    nix = {
-      package = config.lib.test.mkStubPackage {
-        version = lib.getVersion pkgs.nixVersions.stable;
-      };
-      channels.example = exampleChannel;
-      settings.use-xdg-base-directories = true;
+  nix = {
+    package = config.lib.test.mkStubPackage {
+      version = lib.getVersion pkgs.nixVersions.stable;
     };
-
-    nmt.script = ''
-      assertFileContains home-path/etc/profile.d/hm-session-vars.sh \
-        'export NIX_PATH="/home/hm-user/.local/state/nix/defexpr/50-home-manager''${NIX_PATH:+:$NIX_PATH}"'
-      assertFileContent \
-        home-files/.local/state/nix/defexpr/50-home-manager/example/default.nix \
-        ${exampleChannel}/default.nix
-    '';
+    channels.example = exampleChannel;
+    settings.use-xdg-base-directories = true;
   };
+
+  nmt.script = ''
+    assertFileContains home-path/etc/profile.d/hm-session-vars.sh \
+      'export NIX_PATH="/home/hm-user/.local/state/nix/defexpr/50-home-manager''${NIX_PATH:+:$NIX_PATH}"'
+    assertFileContent \
+      home-files/.local/state/nix/defexpr/50-home-manager/example/default.nix \
+      ${exampleChannel}/default.nix
+  '';
 }
diff --git a/tests/modules/misc/nix/example-channels.nix b/tests/modules/misc/nix/example-channels.nix
index 4b98c55d4..189d07094 100644
--- a/tests/modules/misc/nix/example-channels.nix
+++ b/tests/modules/misc/nix/example-channels.nix
@@ -9,18 +9,16 @@ let
     }
   '';
 in {
-  config = {
-    nix = {
-      package = config.lib.test.mkStubPackage { };
-      channels.example = exampleChannel;
-    };
-
-    nmt.script = ''
-      assertFileContains home-path/etc/profile.d/hm-session-vars.sh \
-        'export NIX_PATH="/home/hm-user/.nix-defexpr/50-home-manager''${NIX_PATH:+:$NIX_PATH}"'
-      assertFileContent \
-        home-files/.nix-defexpr/50-home-manager/example/default.nix \
-        ${exampleChannel}/default.nix
-    '';
+  nix = {
+    package = config.lib.test.mkStubPackage { };
+    channels.example = exampleChannel;
   };
+
+  nmt.script = ''
+    assertFileContains home-path/etc/profile.d/hm-session-vars.sh \
+      'export NIX_PATH="/home/hm-user/.nix-defexpr/50-home-manager''${NIX_PATH:+:$NIX_PATH}"'
+    assertFileContent \
+      home-files/.nix-defexpr/50-home-manager/example/default.nix \
+      ${exampleChannel}/default.nix
+  '';
 }
diff --git a/tests/modules/misc/nix/example-registry.nix b/tests/modules/misc/nix/example-registry.nix
index 1875b34d3..99da470ef 100644
--- a/tests/modules/misc/nix/example-registry.nix
+++ b/tests/modules/misc/nix/example-registry.nix
@@ -1,25 +1,21 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
+{ ... }:
 
 {
-  config = {
-    nix = {
-      registry = {
-        nixpkgs = {
-          to = {
-            type = "github";
-            owner = "my-org";
-            repo = "my-nixpkgs";
-          };
+  nix = {
+    registry = {
+      nixpkgs = {
+        to = {
+          type = "github";
+          owner = "my-org";
+          repo = "my-nixpkgs";
         };
       };
     };
-
-    nmt.script = ''
-      assertFileContent \
-        home-files/.config/nix/registry.json \
-        ${./example-registry-expected.json}
-    '';
   };
+
+  nmt.script = ''
+    assertFileContent \
+      home-files/.config/nix/registry.json \
+      ${./example-registry-expected.json}
+  '';
 }
diff --git a/tests/modules/misc/nix/example-settings.nix b/tests/modules/misc/nix/example-settings.nix
index df62fe8d1..c0684fe4a 100644
--- a/tests/modules/misc/nix/example-settings.nix
+++ b/tests/modules/misc/nix/example-settings.nix
@@ -1,38 +1,34 @@
 { config, lib, pkgs, ... }:
 
-with lib;
-
 {
-  config = {
-    nix = {
-      package = config.lib.test.mkStubPackage {
-        version = lib.getVersion pkgs.nixVersions.stable;
-        buildScript = ''
-          target=$out/bin/nix
-          mkdir -p "$(dirname "$target")"
+  nix = {
+    package = config.lib.test.mkStubPackage {
+      version = lib.getVersion pkgs.nixVersions.stable;
+      buildScript = ''
+        target=$out/bin/nix
+        mkdir -p "$(dirname "$target")"
 
-          echo -n "true" > "$target"
+        echo -n "true" > "$target"
 
-          chmod +x "$target"
-        '';
-      };
-
-      nixPath = [ "/a" "/b/c" ];
-
-      settings = {
-        use-sandbox = true;
-        show-trace = true;
-        system-features = [ "big-parallel" "kvm" "recursive-nix" ];
-      };
+        chmod +x "$target"
+      '';
     };
 
-    nmt.script = ''
-      assertFileContent \
-        home-files/.config/nix/nix.conf \
-        ${./example-settings-expected.conf}
+    nixPath = [ "/a" "/b/c" ];
 
-      assertFileContains home-path/etc/profile.d/hm-session-vars.sh \
-        'export NIX_PATH="/a:/b/c''${NIX_PATH:+:$NIX_PATH}"'
-    '';
+    settings = {
+      use-sandbox = true;
+      show-trace = true;
+      system-features = [ "big-parallel" "kvm" "recursive-nix" ];
+    };
   };
+
+  nmt.script = ''
+    assertFileContent \
+      home-files/.config/nix/nix.conf \
+      ${./example-settings-expected.conf}
+
+    assertFileContains home-path/etc/profile.d/hm-session-vars.sh \
+      'export NIX_PATH="/a:/b/c''${NIX_PATH:+:$NIX_PATH}"'
+  '';
 }
diff --git a/tests/modules/misc/nix/keep-old-nix-path.nix b/tests/modules/misc/nix/keep-old-nix-path.nix
index 72bd9f164..b7dc63a0c 100644
--- a/tests/modules/misc/nix/keep-old-nix-path.nix
+++ b/tests/modules/misc/nix/keep-old-nix-path.nix
@@ -1,16 +1,14 @@
 { config, ... }:
 
 {
-  config = {
-    nix = {
-      package = config.lib.test.mkStubPackage { };
-      nixPath = [ "/a" "/b/c" ];
-      keepOldNixPath = false;
-    };
-
-    nmt.script = ''
-      assertFileContains home-path/etc/profile.d/hm-session-vars.sh \
-        'export NIX_PATH="/a:/b/c"'
-    '';
+  nix = {
+    package = config.lib.test.mkStubPackage { };
+    nixPath = [ "/a" "/b/c" ];
+    keepOldNixPath = false;
   };
+
+  nmt.script = ''
+    assertFileContains home-path/etc/profile.d/hm-session-vars.sh \
+      'export NIX_PATH="/a:/b/c"'
+  '';
 }