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-rw-r--r--gnu/packages/pdf.scm5
1 files changed, 5 insertions, 0 deletions
diff --git a/gnu/packages/pdf.scm b/gnu/packages/pdf.scm
index 9730e6150c..aba7b974a8 100644
--- a/gnu/packages/pdf.scm
+++ b/gnu/packages/pdf.scm
@@ -521,6 +521,11 @@ by using the poppler rendering engine.")
                       (let ((xorg-server (assoc-ref inputs "xorg-server"))
                             (display ":1"))
                         (setenv "DISPLAY" display)
+
+                        ;; On busy machines, tests may take longer than
+                        ;; the default of four seconds.
+                        (setenv "CK_DEFAULT_TIMEOUT" "20")
+
                         ;; Don't fail due to missing '/etc/machine-id'.
                         (setenv "DBUS_FATAL_WARNINGS" "0")
                         (zero? (system (string-append xorg-server "/bin/Xvfb "