diff --git a/README.md b/README.md
index 69d1e73..f3166ea 100644
--- a/README.md
+++ b/README.md
@@ -216,6 +216,7 @@ first run of `GoFmt` may fail. It is recommended to run `GoInstallBinaries` to i
 | GoStop {job_id}                               | `stop the job started with GoRun`                                        |
 | GoTest                                        | go test ./...                                                            |
 | GoTestSum  {pkgname}                          | run gotestsum and show result in side panel                              |
+| GoTestSum  -w                          | run gotestsum  in watch mode                            |
 | GoTest -c                                     | go test -c current_file_path                                             |
 | GoTest -n                                     | test nearest, see GoTestFunc                                             |
 | GoTest -f                                     | test current file, see GoTestFile                                        |
diff --git a/lua/go.lua b/lua/go.lua
index bdc300b..af95c06 100644
--- a/lua/go.lua
+++ b/lua/go.lua
@@ -104,7 +104,7 @@ _GO_NVIM_CFG = {
   dap_port = 38697, -- can be set to a number or `-1` so go.nvim will pickup a random port
   build_tags = "", --- you can provide extra build tags for tests or debugger
   textobjects = true, -- treesitter binding for text objects
-  test_runner = "go", -- one of {`go`, `richgo`, `dlv`, `ginkgo`}
+  test_runner = "gotestsum", -- one of {`go`, `richgo`, `dlv`, `ginkgo`, `gotestsum`}
   verbose_tests = true, -- set to add verbose flag to tests
   run_in_floaterm = false, -- set to true to run in float window.
   trouble = false, -- true: use trouble to open quickfix
diff --git a/lua/go/commands.lua b/lua/go/commands.lua
index 7260a8a..3891945 100644
--- a/lua/go/commands.lua
+++ b/lua/go/commands.lua
@@ -173,6 +173,9 @@ return {
     end, { complete = package.loaded.go.package_complete, nargs = '*' })
 
     create_cmd('GoTestSum', function(opts)
+      if opts.fargs[1] == '-w' then
+        return require('go.gotestsum').watch()
+      end
       require('go.gotestsum').run(unpack(opts.fargs))
     end, { complete = package.loaded.go.package_complete, nargs = '*' })
 
diff --git a/lua/go/gotestsum.lua b/lua/go/gotestsum.lua
index 9809da3..921a9f1 100644
--- a/lua/go/gotestsum.lua
+++ b/lua/go/gotestsum.lua
@@ -33,7 +33,7 @@ local show_panel = function()
     vim.notify('guihua not installed')
     return
   end
-  if test_panel == nil then
+  if test_panel == nil or not test_panel:is_open() then
     test_panel = panel:new({
       header = '    go test   ',
       render = function(buf)