diff --git a/tests/contracts/testClock.nim b/tests/contracts/testClock.nim
index a21cbda4..47adbf50 100644
--- a/tests/contracts/testClock.nim
+++ b/tests/contracts/testClock.nim
@@ -1,6 +1,7 @@
 import std/times
 import pkg/chronos
 import codex/contracts/clock
+import codex/utils/json
 import ../ethertest
 
 ethersuite "On-Chain Clock":