diff --git a/lib/pure/unittest.nim b/lib/pure/unittest.nim
index 21efea3bc5..77b23b067b 100644
--- a/lib/pure/unittest.nim
+++ b/lib/pure/unittest.nim
@@ -209,3 +209,5 @@ if envOutLvl.len > 0:
     if $opt == envOutLvl:
       outputLevel = opt
       break
+
+system.addQuitProc(resetAttributes)