diff --git a/nixos/tests/cinnamon-wayland.nix b/nixos/tests/cinnamon-wayland.nix
index 632ab53cc529..d26d50dd9dc6 100644
--- a/nixos/tests/cinnamon-wayland.nix
+++ b/nixos/tests/cinnamon-wayland.nix
@@ -51,8 +51,9 @@
           machine.wait_until_succeeds("${eval "Main.runState"} | grep -q 'true,..2'")
 
       with subtest("Check if Cinnamon components actually start"):
-          for i in ["csd-media-keys", "xapp-sn-watcher", "nemo-desktop"]:
-            machine.wait_until_succeeds(f"pgrep -f {i}")
+          # https://unix.stackexchange.com/a/74186
+          for i in ["[c]sd-media-keys", "[x]app-sn-watcher", "[n]emo-desktop"]:
+            machine.wait_until_succeeds(f"pgrep -f \"{i}\"")
           machine.wait_until_succeeds("journalctl -b --grep 'Loaded applet menu@cinnamon.org'")
           machine.wait_until_succeeds("journalctl -b --grep 'calendar@cinnamon.org: Calendar events supported'")
 
@@ -84,6 +85,10 @@
           machine.wait_until_succeeds("${eval "global.display.focus_window.wm_class"} | grep -i 'gnome-terminal'")
           machine.sleep(2)
 
+      # Only can be tested after opening the above apps.
+      with subtest("Check if x-d-p actually starts"):
+          machine.wait_until_succeeds("pgrep -xf \"${pkgs.xdg-desktop-portal}/libexec/xdg-desktop-portal\"")
+
       with subtest("Check if Cinnamon has ever coredumped"):
           machine.fail("coredumpctl --json=short | grep -E 'cinnamon|nemo'")
     '';
diff --git a/nixos/tests/cinnamon.nix b/nixos/tests/cinnamon.nix
index d8b52c261a42..da8bf8847a4b 100644
--- a/nixos/tests/cinnamon.nix
+++ b/nixos/tests/cinnamon.nix
@@ -62,8 +62,9 @@
           machine.wait_until_succeeds("${eval "Main.runState"} | grep -q 'true,..2'")
 
       with subtest("Check if Cinnamon components actually start"):
-          for i in ["csd-media-keys", "cinnamon-killer-daemon", "xapp-sn-watcher", "nemo-desktop"]:
-            machine.wait_until_succeeds(f"pgrep -f {i}")
+          # https://unix.stackexchange.com/a/74186
+          for i in ["[c]sd-media-keys", "[c]innamon-killer-daemon", "[x]app-sn-watcher", "[n]emo-desktop"]:
+            machine.wait_until_succeeds(f"pgrep -f \"{i}\"")
           machine.wait_until_succeeds("journalctl -b --grep 'Loaded applet menu@cinnamon.org'")
           machine.wait_until_succeeds("journalctl -b --grep 'calendar@cinnamon.org: Calendar events supported'")
 
@@ -104,6 +105,10 @@
           machine.sleep(2)
           machine.screenshot("cinnamon_virtual_keyboard")
 
+      # Only can be tested after opening the above apps.
+      with subtest("Check if x-d-p actually starts"):
+          machine.wait_until_succeeds("pgrep -xf \"${pkgs.xdg-desktop-portal}/libexec/xdg-desktop-portal\"")
+
       with subtest("Check if Cinnamon has ever coredumped"):
           machine.fail("coredumpctl --json=short | grep -E 'cinnamon|nemo'")
     '';