diff --git a/gnu/installer/services.scm b/gnu/installer/services.scm
index d40d2b5ad81..fe5d7998dda 100644
--- a/gnu/installer/services.scm
+++ b/gnu/installer/services.scm
@@ -81,6 +81,9 @@
      (desktop-environment
       (name "MATE")
       (snippet '((service mate-desktop-service-type))))
+     (desktop-environment
+      (name "KDE Plasma")
+      (snippet '((service plasma-desktop-service-type))))
      (desktop-environment
       (name "Icewm")
       (packages '((specification->package "icewm"))))
diff --git a/gnu/tests/install.scm b/gnu/tests/install.scm
index dd81a75cbe8..ab290e16582 100644
--- a/gnu/tests/install.scm
+++ b/gnu/tests/install.scm
@@ -2068,6 +2068,7 @@ build (current-guix) and then store a couple of full system images.")
       (list (service gnome-desktop-service-type)
             (service xfce-desktop-service-type)
             (service mate-desktop-service-type)
+            (service plasma-desktop-service-type)
             (set-xorg-configuration
              (xorg-configuration
               (keyboard-layout keyboard-layout)))
@@ -2147,7 +2148,7 @@ build (current-guix) and then store a couple of full system images.")
                              #:encrypted? #t)
                             ;; XXX: The disk-image size guess is too low. Use
                             ;; a constant value until this is fixed.
-                            #:install-size (* 8000 MiB)
-                            #:target-size (* 9000 MiB)))
+                            #:install-size (* 15000 MiB)
+                            #:target-size (* 15000 MiB)))
 
 ;;; install.scm ends here