diff --git a/modules/alacritty/testbed.nix b/modules/alacritty/testbed.nix
new file mode 100644
index 00000000..acc8d81c
--- /dev/null
+++ b/modules/alacritty/testbed.nix
@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+
+let package = pkgs.alacritty;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "Alacritty";
+    inherit package;
+  };
+
+  home-manager.sharedModules = [{
+    programs.alacritty = {
+      enable = true;
+      inherit package;
+    };
+  }];
+}
\ No newline at end of file
diff --git a/modules/chromium/testbed.nix b/modules/chromium/testbed.nix
new file mode 100644
index 00000000..31475acd
--- /dev/null
+++ b/modules/chromium/testbed.nix
@@ -0,0 +1,13 @@
+{ pkgs, ... }:
+
+let package = pkgs.chromium;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "chromium-browser";
+    inherit package;
+  };
+
+  environment.systemPackages = [ package ];
+}
\ No newline at end of file
diff --git a/modules/emacs/testbed.nix b/modules/emacs/testbed.nix
new file mode 100644
index 00000000..c8812d56
--- /dev/null
+++ b/modules/emacs/testbed.nix
@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+
+let package = pkgs.emacs;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "emacs";
+    inherit package;
+  };
+
+  home-manager.sharedModules = [{
+    programs.emacs = {
+      enable = true;
+      inherit package;
+    };
+  }];
+}
\ No newline at end of file
diff --git a/modules/firefox/testbed.nix b/modules/firefox/testbed.nix
new file mode 100644
index 00000000..770c5901
--- /dev/null
+++ b/modules/firefox/testbed.nix
@@ -0,0 +1,21 @@
+{ pkgs, ... }:
+
+let package = pkgs.firefox;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "firefox";
+    inherit package;
+  };
+
+  home-manager.sharedModules = [{
+    programs.firefox = {
+      enable = true;
+      inherit package;
+      profiles.stylix.isDefault = true;
+    };
+
+    stylix.targets.firefox.profileNames = [ "stylix" ];
+  }];
+}
diff --git a/modules/foot/testbed.nix b/modules/foot/testbed.nix
new file mode 100644
index 00000000..da75cb2e
--- /dev/null
+++ b/modules/foot/testbed.nix
@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+
+let package = pkgs.foot;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "org.codeberg.dnkl.foot";
+    inherit package;
+  };
+
+  home-manager.sharedModules = [{
+    programs.foot = {
+      enable = true;
+      inherit package;
+    };
+  }];
+}
\ No newline at end of file
diff --git a/modules/gedit/testbed.nix b/modules/gedit/testbed.nix
new file mode 100644
index 00000000..c645a31d
--- /dev/null
+++ b/modules/gedit/testbed.nix
@@ -0,0 +1,13 @@
+{ pkgs, ... }:
+
+let package = pkgs.gedit;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "org.gnome.gedit";
+    inherit package;
+  };
+
+  environment.systemPackages = [ package ];
+}
\ No newline at end of file
diff --git a/modules/kitty/testbed.nix b/modules/kitty/testbed.nix
new file mode 100644
index 00000000..225ccd62
--- /dev/null
+++ b/modules/kitty/testbed.nix
@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+
+let package = pkgs.kitty;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "kitty";
+    inherit package;
+  };
+
+  home-manager.sharedModules = [{
+    programs.kitty = {
+      enable = true;
+      inherit package;
+    };
+  }];
+}
\ No newline at end of file
diff --git a/modules/qutebrowser/testbed.nix b/modules/qutebrowser/testbed.nix
new file mode 100644
index 00000000..08b3e89e
--- /dev/null
+++ b/modules/qutebrowser/testbed.nix
@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+
+let package = pkgs.qutebrowser;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "org.qutebrowser.qutebrowser";
+    inherit package;
+  };
+
+  home-manager.sharedModules = [{
+    programs.qutebrowser = {
+      enable = true;
+      inherit package;
+    };
+  }];
+}
\ No newline at end of file
diff --git a/modules/vesktop/testbed.nix b/modules/vesktop/testbed.nix
new file mode 100644
index 00000000..68b8c3e0
--- /dev/null
+++ b/modules/vesktop/testbed.nix
@@ -0,0 +1,13 @@
+{ pkgs, ... }:
+
+let package = pkgs.vesktop;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "vesktop";
+    inherit package;
+  };
+
+  environment.systemPackages = [ package ];
+}
\ No newline at end of file
diff --git a/modules/vscode/testbed.nix b/modules/vscode/testbed.nix
new file mode 100644
index 00000000..671fa52d
--- /dev/null
+++ b/modules/vscode/testbed.nix
@@ -0,0 +1,19 @@
+{ pkgs, ... }:
+
+# We are using VSCodium because VSCode is an unfree package
+let package = pkgs.vscodium;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "codium";
+    inherit package;
+  };
+
+  home-manager.sharedModules = [{
+    programs.vscode = {
+      enable = true;
+      inherit package;
+    };
+  }];
+}
\ No newline at end of file
diff --git a/modules/wezterm/testbed.nix b/modules/wezterm/testbed.nix
new file mode 100644
index 00000000..6c7f45f2
--- /dev/null
+++ b/modules/wezterm/testbed.nix
@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+
+let package = pkgs.wezterm;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "org.wezfurlong.wezterm";
+    inherit package;
+  };
+
+  home-manager.sharedModules = [{
+    programs.wezterm = {
+      enable = true;
+      inherit package;
+    };
+  }];
+}
\ No newline at end of file
diff --git a/modules/zathura/testbed.nix b/modules/zathura/testbed.nix
new file mode 100644
index 00000000..7e61e507
--- /dev/null
+++ b/modules/zathura/testbed.nix
@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+
+let package = pkgs.zathura;
+
+in {
+  stylix.testbed.application = {
+    enable = true;
+    name = "org.pwmt.zathura";
+    inherit package;
+  };
+
+  home-manager.sharedModules = [{
+    programs.zathura = {
+      enable = true;
+      inherit package;
+    };
+  }];
+}
\ No newline at end of file
diff --git a/stylix/testbed.nix b/stylix/testbed.nix
index c5b7c1ae..7fc73837 100644
--- a/stylix/testbed.nix
+++ b/stylix/testbed.nix
@@ -25,6 +25,62 @@ let
     };
   };
 
+  applicationModule = { config, lib, ... }: {
+    options.stylix.testbed.application = {
+      enable = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+        description = ''
+          Whether to enable a standard configuration for testing individual
+          applications.
+
+          This will automatically log in as the `${username}` user, then launch
+          the application from its desktop entry.
+
+          This is currently based on GNOME, but the specific desktop environment
+          used may change in the future.
+        '';
+      };
+
+      name = lib.mkOption {
+        type = lib.types.str;
+        description = ''
+          The name of the desktop entry for the application, without the
+          `.desktop` extension.
+        '';
+      };
+
+      package = lib.mkOption {
+        type = lib.types.package;
+        description = ''
+          The application being tested.
+        '';
+      };
+    };
+
+    config = lib.mkIf config.stylix.testbed.application.enable {
+      services.xserver = {
+        enable = true;
+        displayManager.gdm.enable = true;
+        desktopManager.gnome.enable = true;
+      };
+
+      services.displayManager.autoLogin = {
+        enable = true;
+        user = username;
+      };
+
+      # Disable the GNOME tutorial which pops up on first login.
+      environment.gnome.excludePackages = [ pkgs.gnome-tour ];
+
+      environment.systemPackages = [
+        (pkgs.makeAutostartItem {
+          inherit (config.stylix.testbed.application) name package;
+        })
+      ];
+    };
+  };
+
   autoload = builtins.concatLists
     (lib.mapAttrsToList
       (name: _:
@@ -47,6 +103,7 @@ let
 
         modules = [
           commonModule
+          applicationModule
           inputs.self.nixosModules.stylix
           inputs.home-manager.nixosModules.home-manager
           testbed.module