diff --git a/gnu/packages/slang.scm b/gnu/packages/slang.scm
index e3c9134d60..693144e173 100644
--- a/gnu/packages/slang.scm
+++ b/gnu/packages/slang.scm
@@ -64,7 +64,7 @@ (define-public slang
            (lambda _
              (substitute* "src/test/array.sl"
                (("10000,10000,10000,10000,10000,10000")
-                "100,100,100,100,100,100"))))
+                "10,10,10,10,10,10"))))
          (add-before 'configure 'substitute-before-config
            (lambda* (#:key inputs #:allow-other-keys)
              (let ((ncurses (assoc-ref inputs "ncurses")))