diff --git a/lua/mason-nvim-dap/mappings/adapters.lua b/lua/mason-nvim-dap/mappings/adapters.lua
index 65c8cb9..fd8f74c 100644
--- a/lua/mason-nvim-dap/mappings/adapters.lua
+++ b/lua/mason-nvim-dap/mappings/adapters.lua
@@ -70,6 +70,11 @@ M.codelldb = {
 if vim.fn.has('win32') == 1 then
 	M.codelldb.executable.detached = false
 end
+M.mix_task = {
+	type = 'executable',
+	command = 'elixir-ls-debugger', -- https://github.com/williamboman/mason.nvim/blob/d97579ccd5689f9c6c365e841ea99c27954112ec/lua/mason-registry/elixir-ls/init.lua#L26
+	args = {},
+}
 
 M = vim.tbl_deep_extend('force', M, settings.current.automatic_setup.adapters or {})
 
diff --git a/lua/mason-nvim-dap/mappings/configurations.lua b/lua/mason-nvim-dap/mappings/configurations.lua
index 9b8dc34..cdbc047 100644
--- a/lua/mason-nvim-dap/mappings/configurations.lua
+++ b/lua/mason-nvim-dap/mappings/configurations.lua
@@ -164,6 +164,22 @@ M.cppdbg = {
 	},
 }
 
+M.elixir = {
+	{
+		type = 'mix_task',
+		name = 'mix test',
+		task = 'test',
+		taskArgs = { '--trace' },
+		request = 'launch',
+		startApps = true, -- for Phoenix projects
+		projectDir = '${workspaceFolder}',
+		requireFiles = {
+			'test/**/test_helper.exs',
+			'test/**/*_test.exs',
+		},
+	},
+}
+
 M = vim.tbl_deep_extend('force', M, settings.current.automatic_setup.configurations or {})
 
 return M
diff --git a/lua/mason-nvim-dap/mappings/filetypes.lua b/lua/mason-nvim-dap/mappings/filetypes.lua
index 170c590..ef01471 100644
--- a/lua/mason-nvim-dap/mappings/filetypes.lua
+++ b/lua/mason-nvim-dap/mappings/filetypes.lua
@@ -13,6 +13,7 @@ M.adapter_to_configs = {
 	['python'] = { 'python' },
 	['cppdbg'] = { 'c', 'cpp', 'rust' },
 	['codelldb'] = { 'c', 'cpp', 'rust' },
+	['mix_task'] = { 'elixir' },
 }
 
 return M