diff --git a/lua/neotest/client/strategies/overseer.lua b/lua/neotest/client/strategies/overseer.lua
index 9c582acb..58a41798 100644
--- a/lua/neotest/client/strategies/overseer.lua
+++ b/lua/neotest/client/strategies/overseer.lua
@@ -1,6 +1,6 @@
-local async = require("neotest.async")
 local lib = require("neotest.lib")
 local log = require("overseer.log")
+local nio = require("nio")
 local overseer = require("overseer")
 local util = require("overseer.util")
 
@@ -49,8 +49,12 @@ local function get_or_create_task(spec, output_path)
     task.cwd = spec.cwd
   else
     -- Create a new task
+    local name = "Neotest"
+    if spec.position and spec.position.name then
+      name = string.format("%s %s", name, spec.position.name)
+    end
     local opts = vim.tbl_extend("keep", spec.strategy or {}, {
-      name = "Neotest",
+      name = name,
       components = { "default_neotest" },
     })
     if type(opts.components) == "function" then
@@ -83,17 +87,19 @@ local function get_or_create_task(spec, output_path)
   return task
 end
 
+---@param spec neotest.RunSpec
+---@return neotest.Process
 local function get_strategy(spec)
   if not overseer.component.get_alias("default_neotest") then
     overseer.component.alias("default_neotest", { "default" })
   end
 
-  local finish_cond = async.control.Condvar.new()
+  local finish_future = nio.control.future()
   local attach_win
-  local output_path = async.fn.tempname()
+  local output_path = nio.fn.tempname()
   local task = get_or_create_task(spec, output_path)
   task:subscribe("on_complete", function()
-    finish_cond:notify_all()
+    finish_future.set()
     return false
   end)
   task:start()
@@ -104,31 +110,29 @@ local function get_strategy(spec)
     output = function()
       return output_path
     end,
-    stop = function()
+    stop = vim.schedule_wrap(function()
       task:stop()
-    end,
+    end),
     output_stream = function()
-      local sender, receiver = async.control.channel.mpsc()
+      local queue = nio.control.queue()
       task:subscribe("on_output", function(_, data)
-        sender.send(table.concat(data, "\n"))
+        queue.put_nowait(table.concat(data, "\n"))
       end)
       return function()
-        return async.lib.first(function()
-          finish_cond:wait()
-        end, receiver.recv)
+        return nio.first({ finish_future.wait, queue.get })
       end
     end,
     attach = function()
       local bufnr = task:get_bufnr()
-      if not bufnr or not vim.api.nvim_buf_is_valid(bufnr) then
+      if not bufnr or not nio.api.nvim_buf_is_valid(bufnr) then
         return
       end
       attach_win = lib.ui.float.open({
-        height = spec.strategy.height,
-        width = spec.strategy.width,
+        height = spec.strategy.height or 40,
+        width = spec.strategy.width or 120,
         buffer = bufnr,
       })
-      async.api.nvim_buf_set_keymap(bufnr, "n", "q", "", {
+      nio.api.nvim_buf_set_keymap(bufnr, "n", "q", "", {
         noremap = true,
         silent = true,
         callback = function()
@@ -139,7 +143,7 @@ local function get_strategy(spec)
     end,
     result = function()
       if not task:is_complete() then
-        finish_cond:wait()
+        finish_future:wait()
       end
       if attach_win then
         vim.schedule(function()
diff --git a/lua/neotest/consumers/overseer.lua b/lua/neotest/consumers/overseer.lua
index b43dff08..c1db6c68 100644
--- a/lua/neotest/consumers/overseer.lua
+++ b/lua/neotest/consumers/overseer.lua
@@ -1,6 +1,6 @@
-local async = require("neotest.async")
 local config = require("neotest.config")
 local lib = require("neotest.lib")
+local nio = require("nio")
 
 local neotest = {}
 neotest.overseer = {}
@@ -9,7 +9,7 @@ local client
 local last_group_id = 0
 local task_groups = {}
 
-function neotest.overseer.run(args)
+neotest.overseer.run = nio.create(function(args)
   args = args or {}
   if type(args) == "string" then
     args = { args }
@@ -19,50 +19,41 @@ function neotest.overseer.run(args)
     return neotest.run.run(args)
   end
   local strategy = require("neotest.client.strategies.overseer")
-  async.run(function()
-    local tree = neotest.run.get_tree_from_args(args, true)
-    if not tree then
-      lib.notify("No tests found")
-      return
-    end
+  local tree = neotest.run.get_tree_from_args(args, true)
+  if not tree then
+    lib.notify("No tests found")
+    return
+  end
 
-    if not args.strategy then
-      local root = tree:root():data().path
-      local default_strategy = config.projects[root].default_strategy
-      if
-        default_strategy
-        and default_strategy ~= "overseer"
-        and default_strategy ~= "integrated"
-      then
-        return neotest.run.run(args)
-      end
+  if not args.strategy then
+    local root = tree:root():data().path
+    local default_strategy = config.projects[root].default_strategy
+    if default_strategy and default_strategy ~= "overseer" and default_strategy ~= "integrated" then
+      return neotest.run.run(args)
     end
+  end
 
-    args.strategy = "overseer"
-    last_group_id = last_group_id + 1
-    args.overseer_group_id = last_group_id
-    strategy.set_group_id(last_group_id)
+  args.strategy = "overseer"
+  last_group_id = last_group_id + 1
+  strategy.set_group_id(last_group_id)
 
-    task_groups[last_group_id] = { args = args, position_id = tree:data().id }
-    client:run_tree(tree, args)
-  end)
-end
+  task_groups[last_group_id] = { args = args, position_id = tree:data().id }
+  client:run_tree(tree, args)
+end, 1)
 
 ---@private
-function neotest.overseer.rerun_task_group(group_id)
+neotest.overseer.rerun_task_group = nio.create(function(group_id)
   local strategy = require("neotest.client.strategies.overseer")
   strategy.recycle_group(group_id)
   strategy.set_group_id(group_id)
   local group = task_groups[group_id]
-  async.run(function()
-    local tree = client:get_position(group.position_id, group.args)
-    if not tree then
-      lib.notify("Prior test could not be found")
-      return
-    end
-    client:run_tree(tree, group.args)
-  end)
-end
+  local tree = client:get_position(group.position_id, group.args)
+  if not tree then
+    lib.notify("Prior test could not be found")
+    return
+  end
+  client:run_tree(tree, group.args)
+end, 1)
 
 function neotest.overseer.run_last(args)
   args = args or {}
diff --git a/lua/overseer/component/unique.lua b/lua/overseer/component/unique.lua
index c627bd6e..6b42a856 100644
--- a/lua/overseer/component/unique.lua
+++ b/lua/overseer/component/unique.lua
@@ -1,4 +1,5 @@
 local task_list = require("overseer.task_list")
+local util = require("overseer.util")
 return {
   desc = "Ensure that this task does not have any duplicates",
   -- Doesn't make sense for user to add this using a form.
@@ -23,6 +24,10 @@ return {
         for _, t in ipairs(tasks) do
           if t.name == task.name and t ~= task then
             if params.replace then
+              task:subscribe("on_start", function()
+                util.replace_buffer_in_wins(t:get_bufnr(), task:get_bufnr())
+                return false
+              end)
               t:dispose(true)
             else
               task:dispose(true)
diff --git a/lua/overseer/task.lua b/lua/overseer/task.lua
index db9fa58d..64adba60 100644
--- a/lua/overseer/task.lua
+++ b/lua/overseer/task.lua
@@ -362,7 +362,7 @@ end
 ---Listeners cannot be serialized, so will not be saved when saving task to disk and will not be
 ---copied when cloning the task.
 ---@param event string
----@param callback fun(task: overseer.Task) Callback can return false to unsubscribe itself
+---@param callback fun(task: overseer.Task): nil|boolean Callback can return false to unsubscribe itself
 function Task:subscribe(event, callback)
   if not self._subscribers[event] then
     self._subscribers[event] = {}
@@ -634,20 +634,7 @@ function Task:start()
     vim.api.nvim_buf_set_option(bufnr, "buflisted", false)
   end
 
-  -- If this task's previous buffer was open in any wins, replace it
-  if bufnr and self.prev_bufnr then
-    local prev_bufnr = self.prev_bufnr
-    for _, win in ipairs(vim.api.nvim_list_wins()) do
-      if vim.api.nvim_win_is_valid(win) and vim.api.nvim_win_get_buf(win) == prev_bufnr then
-        -- If stickybuf is installed, make sure it doesn't interfere
-        pcall(vim.api.nvim_win_del_var, win, "sticky_original_bufnr")
-        pcall(vim.api.nvim_win_del_var, win, "sticky_bufnr")
-        pcall(vim.api.nvim_win_del_var, win, "sticky_buftype")
-        pcall(vim.api.nvim_win_del_var, win, "sticky_filetype")
-        vim.api.nvim_win_set_buf(win, bufnr)
-      end
-    end
-  end
+  util.replace_buffer_in_wins(self.prev_bufnr, bufnr)
   self.prev_bufnr = bufnr
   return true
 end
diff --git a/lua/overseer/util.lua b/lua/overseer/util.lua
index 8f4a5029..c75f7260 100644
--- a/lua/overseer/util.lua
+++ b/lua/overseer/util.lua
@@ -683,4 +683,23 @@ M.hack_around_termopen_autocmd = function(prev_mode)
   end, 10)
 end
 
+---@param old_bufnr nil|integer
+---@param new_bufnr nil|integer
+M.replace_buffer_in_wins = function(old_bufnr, new_bufnr)
+  if not old_bufnr or not new_bufnr then
+    return
+  end
+  local has_stickybuf, stickybuf = pcall(require, "stickybuf")
+  -- If this task's previous buffer was open in any wins, replace it
+  for _, win in ipairs(vim.api.nvim_list_wins()) do
+    if vim.api.nvim_win_is_valid(win) and vim.api.nvim_win_get_buf(win) == old_bufnr then
+      -- If stickybuf is installed, make sure it doesn't interfere
+      if has_stickybuf then
+        stickybuf.unpin(win)
+      end
+      vim.api.nvim_win_set_buf(win, new_bufnr)
+    end
+  end
+end
+
 return M