From b4b4a96aaeb468881c8fe510a9a871e4931eeb1a Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gregor.kleen@ifi.lmu.de>
Date: Mon, 20 Jul 2020 16:47:44 +0200
Subject: [PATCH] fix: tests

---
 test/ModelSpec.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/ModelSpec.hs b/test/ModelSpec.hs
index 9f156a1f6..148c8c064 100644
--- a/test/ModelSpec.hs
+++ b/test/ModelSpec.hs
@@ -64,7 +64,7 @@ instance Arbitrary Sheet where
     <*> arbitrary
     <*> arbitrary
     <*> arbitrary
-    <*> arbitrary
+    <*> return Nothing
   shrink = genericShrink
 
 instance Arbitrary Tutorial where