--- a/spec/util_format_spec.lua	Sat Nov 16 16:45:33 2019 +0100
+++ b/spec/util_format_spec.lua	Sat Nov 16 16:52:31 2019 +0100
@@ -5,10 +5,15 @@
 		it("should work", function()
 			assert.equal("hello", format("%s", "hello"));
 			assert.equal("<nil>", format("%s"));
+			assert.equal("<nil>", format("%d"));
+			assert.equal("<nil>", format("%q"));
 			assert.equal(" [<nil>]", format("", nil));
 			assert.equal("true", format("%s", true));
 			assert.equal("[true]", format("%d", true));
 			assert.equal("% [true]", format("%%", true));
+			assert.equal("{ }", format("%q", { }));
+			assert.equal("[1.5]", format("%d", 1.5));
+			assert.equal("[7.3786976294838e+19]", format("%d", 73786976294838206464));
 		end);
 	end);
 end);