diff --git a/tests/test-csexp.lua b/tests/test-csexp.lua
index edef1a7..2c5d0cb 100644
--- a/tests/test-csexp.lua
+++ b/tests/test-csexp.lua
@@ -4,44 +4,44 @@ local serialize, parse = csexp.serialize, csexp.parse
 local describe, it, expect = lester.describe, lester.it, lester.expect
 
 describe("csexp", function()
-  describe("serialize", function()
-    it("handles empty string", function()
-      expect.equal(serialize"", "0:")
-    end)
-    
-    it("handles nonempty string", function()
-      expect.equal(serialize"abcd", "4:abcd")
-    end)
-  
-    it("handles empty list", function()
-      expect.equal(serialize{}, "()")
-    end)
-  
-    it("converts non-string values", function()
-      expect.equal(serialize(12345), "5:12345")
-    end)
-  
-    it("inverts parse", function()
-      local original = "(10:abcdefghij(5:hello(5:world)7:goodbye))"
-      local obj = parse(original)
-      local serialized = serialize(obj)
-      expect.equal(serialized, original)
-    end)
-  end)
+	describe("serialize", function()
+		it("handles empty string", function()
+			expect.equal(serialize"", "0:")
+		end)
+		
+		it("handles nonempty string", function()
+			expect.equal(serialize"abcd", "4:abcd")
+		end)
+	
+		it("handles empty list", function()
+			expect.equal(serialize{}, "()")
+		end)
+	
+		it("converts non-string values", function()
+			expect.equal(serialize(12345), "5:12345")
+		end)
+	
+		it("inverts parse", function()
+			local original = "(10:abcdefghij(5:hello(5:world)7:goodbye))"
+			local obj = parse(original)
+			local serialized = serialize(obj)
+			expect.equal(serialized, original)
+		end)
+	end)
 
-  describe("parse", function()
-    local rejects = {
-      ["malformed lists"] = "(5:hello5:world",
-      ["early eof in strings"] = "5:1234",
-      ["extra chars in strings"] = "5:123456",
-      ["extra chars after list"] = "()0:"
-    }
-    for description, value in pairs(rejects) do
-      it("rejects "..description, function()
-        expect.fail(function()
-          parse(value)
-        end)
-      end)
-    end
-  end)
+	describe("parse", function()
+		local rejects = {
+			["malformed lists"] = "(5:hello5:world",
+			["early eof in strings"] = "5:1234",
+			["extra chars in strings"] = "5:123456",
+			["extra chars after list"] = "()0:"
+		}
+		for description, value in pairs(rejects) do
+			it("rejects "..description, function()
+				expect.fail(function()
+					parse(value)
+				end)
+			end)
+		end
+	end)
 end)
\ No newline at end of file