diff --git a/runtime/lua/vim/pack.lua b/runtime/lua/vim/pack.lua
index a218a38d6a..0a4058be56 100644
--- a/runtime/lua/vim/pack.lua
+++ b/runtime/lua/vim/pack.lua
@@ -819,7 +819,7 @@ local function lock_write()
   local fd = assert(uv.fs_open(path, 'w', 438))
 
   local data = vim.json.encode(lock, { indent = '  ', sort_keys = true })
-  assert(uv.fs_write(fd, data))
+  assert(uv.fs_write(fd, data .. '\n'))
   assert(uv.fs_close(fd))
 end
 
diff --git a/test/functional/plugin/pack_spec.lua b/test/functional/plugin/pack_spec.lua
index 484be65f3c..88fbdbe047 100644
--- a/test/functional/plugin/pack_spec.lua
+++ b/test/functional/plugin/pack_spec.lua
@@ -574,7 +574,8 @@ describe('vim.pack', function()
               "version": ">=0.0.0"
             }
           }
-        }]]):format(
+        }
+        ]]):format(
         basic_rev,
         repos_src.basic,
         defbranch_rev,