diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c284c65..f8772d5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -28,4 +28,4 @@ jobs:
       - name: Run Tests
         run: |
           nvim --version
-          nvim --headless -u test/init.lua -c "lua require'plenary.test_harness'.test_directory('test/', {minimal_init='test/init.lua',sequential=true})"
+          make test
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..64da472
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,2 @@
+test: *
+	nvim --headless -u test/init.lua -c "lua require'plenary.test_harness'.test_directory('test/', {minimal_init='test/init.lua',sequential=true})"
diff --git a/lua/splitjoin.lua b/lua/splitjoin.lua
index d1b4e4c..d8afb1a 100644
--- a/lua/splitjoin.lua
+++ b/lua/splitjoin.lua
@@ -9,8 +9,12 @@ local is_in_node_range = vim.treesitter.is_in_node_range
 ---@field default_indent string
 ---@field surround string[] tuple of surround strings
 ---@field separator string=','
+---@field separator_is_node boolean=true
 ---@field padding string
----@field trailing_separator boolean=true
+---@field trailing_separator boolean=true true when a trailing separator (e.g. trailing comma) is permitted/desired
+
+---@class SplitjoinLanguageConfig
+---@field nodes table<string, SplitjoinLanguageOptions>
 
 ---@class SplitjoinOptions
 ---@field default_indent string