diff --git a/test/benchmark/decor_spec.lua b/test/benchmark/decor_spec.lua
index 2e04d44686..b4ce4b55c2 100644
--- a/test/benchmark/decor_spec.lua
+++ b/test/benchmark/decor_spec.lua
@@ -8,7 +8,7 @@ describe('decor perf', function()
   it('can handle long lines', function()
     Screen.new(100, 101)
 
-    local result = exec_lua [==[
+    local result = exec_lua(function()
       local ephemeral_pattern = {
         { 0, 4, 'Comment', 11 },
         { 0, 3, 'Keyword', 12 },
@@ -61,7 +61,7 @@ describe('decor perf', function()
           return true
         end,
         on_line = function()
-            add_pattern(ephemeral_pattern, true)
+          add_pattern(ephemeral_pattern, true)
         end,
       })
 
@@ -69,16 +69,16 @@ describe('decor perf', function()
 
       local total = {}
       local provider = {}
-      for i = 1, 100 do
+      for _ = 1, 100 do
         local tic = vim.uv.hrtime()
-        vim.cmd'redraw!'
+        vim.cmd 'redraw!'
         local toc = vim.uv.hrtime()
         table.insert(total, toc - tic)
         table.insert(provider, pe - ps)
       end
 
       return { total, provider }
-    ]==]
+    end)
 
     local total, provider = unpack(result)
     table.sort(total)
@@ -102,22 +102,22 @@ describe('decor perf', function()
   it('can handle long lines with treesitter highlighting', function()
     Screen.new(100, 51)
 
-    local result = exec_lua [==[
+    local result = exec_lua(function()
       local long_line = 'local a = { ' .. ('a = 5, '):rep(2000) .. '}'
       vim.api.nvim_buf_set_lines(0, 0, 0, false, { long_line })
       vim.api.nvim_win_set_cursor(0, { 1, 0 })
       vim.treesitter.start(0, 'lua')
 
       local total = {}
-      for i = 1, 50 do
+      for _ = 1, 50 do
         local tic = vim.uv.hrtime()
-        vim.cmd'redraw!'
+        vim.cmd 'redraw!'
         local toc = vim.uv.hrtime()
         table.insert(total, toc - tic)
       end
 
       return { total }
-    ]==]
+    end)
 
     local total = unpack(result)
     table.sort(total)
diff --git a/test/benchmark/treesitter_spec.lua b/test/benchmark/treesitter_spec.lua
index f83aa51eb0..222a2ae8fb 100644
--- a/test/benchmark/treesitter_spec.lua
+++ b/test/benchmark/treesitter_spec.lua
@@ -49,33 +49,28 @@ describe('treesitter perf', function()
     ]]
   end)
 
-  local function test_long_line(pos, wrap, line, grid)
+  local function test_long_line(_pos, _wrap, _line, grid)
     local screen = Screen.new(20, 11)
 
-    local result = exec_lua(
-      [==[
-        local pos, wrap, line = ...
+    local result = exec_lua(function(...)
+      local pos, wrap, line = ...
 
-        vim.api.nvim_buf_set_lines(0, 0, 0, false, { line })
-        vim.api.nvim_win_set_cursor(0, pos)
-        vim.api.nvim_set_option_value('wrap', wrap, { win = 0 })
+      vim.api.nvim_buf_set_lines(0, 0, 0, false, { line })
+      vim.api.nvim_win_set_cursor(0, pos)
+      vim.api.nvim_set_option_value('wrap', wrap, { win = 0 })
 
-        vim.treesitter.start(0, 'lua')
+      vim.treesitter.start(0, 'lua')
 
-        local total = {}
-        for i = 1, 100 do
-          local tic = vim.uv.hrtime()
-          vim.cmd'redraw!'
-          local toc = vim.uv.hrtime()
-          table.insert(total, toc - tic)
-        end
+      local total = {}
+      for _ = 1, 100 do
+        local tic = vim.uv.hrtime()
+        vim.cmd 'redraw!'
+        local toc = vim.uv.hrtime()
+        table.insert(total, toc - tic)
+      end
 
-        return { total }
-      ]==],
-      pos,
-      wrap,
-      line
-    )
+      return { total }
+    end, _pos, _wrap, _line)
 
     screen:expect({ grid = grid or '' })
 
diff --git a/test/functional/ui/decorations_spec.lua b/test/functional/ui/decorations_spec.lua
index 1e702b1954..a839de9d70 100644
--- a/test/functional/ui/decorations_spec.lua
+++ b/test/functional/ui/decorations_spec.lua
@@ -716,46 +716,44 @@ describe('decorations providers', function()
     setup_screen(screen)
 
     local function record()
-      exec_lua [[
-        p_min = { math.huge, math.huge }
-        p_max = { -math.huge, -math.huge }
-        function pos_gt(a, b)
+      exec_lua(function()
+        _G.p_min = { math.huge, math.huge }
+        _G.p_max = { -math.huge, -math.huge }
+        function _G.pos_gt(a, b)
           return a[1] > b[1] or (a[1] == b[1] and a[2] > b[2])
         end
-        function pos_lt(a, b)
+        function _G.pos_lt(a, b)
           return a[1] < b[1] or (a[1] == b[1] and a[2] < b[2])
         end
-      ]]
+      end)
       setup_provider [[
         local function on_do(kind, _, bufnr, br, bc, er, ec)
           if kind == 'range' then
             local b = { br, bc }
             local e = { er, ec }
-            if pos_gt(p_min, b) then
-              p_min = b
+            if _G.pos_gt(_G.p_min, b) then
+              _G.p_min = b
             end
-            if pos_lt(p_max, e) then
-              p_max = e
+            if _G.pos_lt(_G.p_max, e) then
+              _G.p_max = e
             end
           end
         end
       ]]
     end
     local function check(min, max)
-      local function pos_gt(a, b)
-        return a[1] > b[1] or (a[1] == b[1] and a[2] > b[2])
-      end
-      local function pos_lt(a, b)
-        return a[1] < b[1] or (a[1] == b[1] and a[2] < b[2])
-      end
-      local p_min = exec_lua('return p_min')
-      assert(not pos_gt(p_min, min),
+      local p_min = exec_lua('return _G.p_min')
+      assert(
+        p_min[1] < min[1] or (p_min[1] == min[1] and p_min[2] <= min[2]),
         "minimum position " .. vim.inspect(p_min)
-        .. " should be before the first char")
-      local p_max = exec_lua('return p_max')
-      assert(not pos_lt(p_max, max),
+        .. " should be before the first char"
+      )
+      local p_max = exec_lua('return _G.p_max')
+      assert(
+        p_max[1] > max[1] or (p_max[1] == max[1] and p_max[2] >= max[2]),
         "maximum position " .. vim.inspect(p_max)
-        .. " should be on or after the last char")
+        .. " should be on or after the last char"
+      )
     end
 
     -- Multiple lines.