diff --git a/test/functional/helpers.lua b/test/functional/helpers.lua
index fc6bf80d7e..508bb6e593 100644
--- a/test/functional/helpers.lua
+++ b/test/functional/helpers.lua
@@ -1,4 +1,5 @@
 require('coxpcall')
+local assert = require('luassert')
 local Loop = require('nvim.loop')
 local MsgpackStream = require('nvim.msgpack_stream')
 local AsyncSession = require('nvim.async_session')
diff --git a/test/unit/helpers.lua b/test/unit/helpers.lua
index 1b97a2f15a..708e7a94ab 100644
--- a/test/unit/helpers.lua
+++ b/test/unit/helpers.lua
@@ -1,3 +1,4 @@
+local assert = require('luassert')
 local ffi = require('ffi')
 local formatc = require('test.unit.formatc')
 local Set = require('test.unit.set')