diff --git a/nixos/tests/ft2-clone.nix b/nixos/tests/ft2-clone.nix
index c4f1475ad710..faea0d30aa50 100644
--- a/nixos/tests/ft2-clone.nix
+++ b/nixos/tests/ft2-clone.nix
@@ -11,6 +11,13 @@
       imports = [
         ./common/x11.nix
       ];
+
+      boot.kernelModules = [ "snd-dummy" ];
+      services.pulseaudio = {
+        enable = true;
+        systemWide = true;
+      };
+      services.pipewire.enable = false;
       environment.systemPackages = [ pkgs.ft2-clone ];
     };
 
@@ -18,8 +25,6 @@
 
   testScript = ''
     machine.wait_for_x()
-    # Add a dummy sound card, or the program won't start
-    machine.execute("modprobe snd-dummy")
 
     machine.execute("ft2-clone >&2 &")
 
diff --git a/nixos/tests/pt2-clone.nix b/nixos/tests/pt2-clone.nix
index 160431175f8d..de48f93e1ed5 100644
--- a/nixos/tests/pt2-clone.nix
+++ b/nixos/tests/pt2-clone.nix
@@ -12,7 +12,12 @@
         ./common/x11.nix
       ];
 
-      services.xserver.enable = true;
+      boot.kernelModules = [ "snd-dummy" ];
+      services.pulseaudio = {
+        enable = true;
+        systemWide = true;
+      };
+      services.pipewire.enable = false;
       environment.systemPackages = [ pkgs.pt2-clone ];
     };
 
@@ -20,16 +25,13 @@
 
   testScript = ''
     machine.wait_for_x()
-    # Add a dummy sound card, or the program won't start
-    machine.execute("modprobe snd-dummy")
 
     machine.execute("pt2-clone >&2 &")
 
     machine.wait_for_window(r"ProTracker")
     machine.sleep(5)
     # One of the few words that actually get recognized
-    if "LENGTH" not in machine.get_screen_text():
-        raise Exception("Program did not start successfully")
+    machine.wait_for_text("LENGTH")
     machine.screenshot("screen")
   '';
 }
diff --git a/nixos/tests/sfxr-qt.nix b/nixos/tests/sfxr-qt.nix
index f62eeacafbd5..764911610ed7 100644
--- a/nixos/tests/sfxr-qt.nix
+++ b/nixos/tests/sfxr-qt.nix
@@ -5,7 +5,7 @@
     maintainers = [ fgaz ];
   };
 
-  machine =
+  nodes.machine =
     { config, pkgs, ... }:
     {
       imports = [
@@ -13,6 +13,12 @@
       ];
 
       services.xserver.enable = true;
+      boot.kernelModules = [ "snd-dummy" ];
+      services.pulseaudio = {
+        enable = true;
+        systemWide = true;
+      };
+      services.pipewire.enable = false;
       environment.systemPackages = [ pkgs.sfxr-qt ];
     };