2 files changed, 40 insertions, 50 deletions
diff --git a/test/functional/options/defaults_spec.lua b/test/functional/options/defaults_spec.lua
index e7f47ef4e9..a82279e775 100644
--- a/test/functional/options/defaults_spec.lua
+++ b/test/functional/options/defaults_spec.lua
@@ -14,7 +14,6 @@ local api = n.api
 local command = n.command
 local clear = n.clear
 local exc_exec = n.exc_exec
-local exec_lua = n.exec_lua
 local eval = n.eval
 local eq = t.eq
 local ok = t.ok
@@ -929,17 +928,12 @@ describe('stdpath()', function()
     assert_alive() -- Check for crash. #8393
 
     -- Check that Nvim rejects invalid APPNAMEs
-    -- Call jobstart() and jobwait() in the same RPC request to reduce flakiness.
     local function test_appname(testAppname, expected_exitcode)
-      local lua_code = string.format(
-        [[
-        local child = vim.fn.jobstart({ vim.v.progpath, '--clean', '--headless', '--listen', 'x', '+qall!' }, { env = { NVIM_APPNAME = %q } })
-        return vim.fn.jobwait({ child }, %d)[1]
-      ]],
-        testAppname,
-        3000
-      )
-      eq(expected_exitcode, exec_lua(lua_code))
+      local p = n.spawn_wait({
+        args = { '--listen', 'x', '+qall!' },
+        env = { NVIM_APPNAME = testAppname },
+      })
+      eq(expected_exitcode, p.status)
     end
     -- Invalid appnames:
     test_appname('a/../b', 1)
diff --git a/test/functional/options/winfixbuf_spec.lua b/test/functional/options/winfixbuf_spec.lua
index 124f194b5a..a01650ea71 100644
--- a/test/functional/options/winfixbuf_spec.lua
+++ b/test/functional/options/winfixbuf_spec.lua
@@ -1,55 +1,51 @@
 local n = require('test.functional.testnvim')()
+local t = require('test.testutil')
 
 local clear = n.clear
 local exec_lua = n.exec_lua
 
-describe("Nvim API calls with 'winfixbuf'", function()
+describe("'winfixbuf'", function()
   before_each(function()
     clear()
   end)
 
-  it("Calling vim.api.nvim_win_set_buf with 'winfixbuf'", function()
-    local results = exec_lua([[
-      local function _setup_two_buffers()
-        local buffer = vim.api.nvim_create_buf(true, true)
-
-        vim.api.nvim_create_buf(true, true)  -- Make another buffer
-
-        local current_window = 0
-        vim.api.nvim_set_option_value("winfixbuf", true, {win=current_window})
-
-        return buffer
-      end
-
-      local other_buffer = _setup_two_buffers()
-      local current_window = 0
-      local results, _ = pcall(vim.api.nvim_win_set_buf, current_window, other_buffer)
-
-      return results
+  ---@return integer
+  local function setup_winfixbuf()
+    return exec_lua([[
+      local buffer = vim.api.nvim_create_buf(true, true)
+      vim.api.nvim_create_buf(true, true)  -- Make another buffer
+      vim.wo.winfixbuf = true
+      return buffer
     ]])
-
-    assert(results == false)
+  end
+
+  it('nvim_win_set_buf on non-current buffer', function()
+    local other_buf = setup_winfixbuf()
+    t.eq(
+      "Vim:E1513: Cannot switch buffer. 'winfixbuf' is enabled",
+      t.pcall_err(n.api.nvim_win_set_buf, 0, other_buf)
+    )
   end)
 
-  it("Calling vim.api.nvim_set_current_buf with 'winfixbuf'", function()
-    local results = exec_lua([[
-      local function _setup_two_buffers()
-        local buffer = vim.api.nvim_create_buf(true, true)
-
-        vim.api.nvim_create_buf(true, true)  -- Make another buffer
-
-        local current_window = 0
-        vim.api.nvim_set_option_value("winfixbuf", true, {win=current_window})
-
-        return buffer
-      end
-
-      local other_buffer = _setup_two_buffers()
-      local results, _ = pcall(vim.api.nvim_set_current_buf, other_buffer)
+  it('nvim_set_current_buf on non-current buffer', function()
+    local other_buf = setup_winfixbuf()
+    t.eq(
+      "Vim:E1513: Cannot switch buffer. 'winfixbuf' is enabled",
+      t.pcall_err(n.api.nvim_set_current_buf, other_buf)
+    )
+  end)
 
-      return results
-    ]])
+  it('nvim_win_set_buf on current buffer', function()
+    setup_winfixbuf()
+    local curbuf = n.api.nvim_get_current_buf()
+    n.api.nvim_win_set_buf(0, curbuf)
+    t.eq(curbuf, n.api.nvim_get_current_buf())
+  end)
 
-    assert(results == false)
+  it('nvim_set_current_buf on current buffer', function()
+    setup_winfixbuf()
+    local curbuf = n.api.nvim_get_current_buf()
+    n.api.nvim_set_current_buf(curbuf)
+    t.eq(curbuf, n.api.nvim_get_current_buf())
   end)
 end)