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-rw-r--r--gnu/tests/install.scm2
1 files changed, 2 insertions, 0 deletions
diff --git a/gnu/tests/install.scm b/gnu/tests/install.scm
index 799a65907b..713e03194b 100644
--- a/gnu/tests/install.scm
+++ b/gnu/tests/install.scm
@@ -1125,6 +1125,8 @@ build (current-guix) and then store a couple of full system images.")
                                #:os installation-os-for-gui-tests
                                #:install-size install-size
                                #:target-size target-size
+                               #:installation-disk-image-file-system-type
+                               "iso9660"
                                #:gui-test
                                (lambda (marionette)
                                  (gui-test-program