diff --git a/dev-test/tests/assertion.lua b/dev-test/tests/assertion.lua
new file mode 100644
index 0000000..cb3eec3
--- /dev/null
+++ b/dev-test/tests/assertion.lua
@@ -0,0 +1,74 @@
+local loaded = {}
+local linked = {}
+
+local LUA_NAN_ARITHMETIC = 0 / 0
+local LUA_NAN_CANONICAL = 0 / 0
+local LUA_NAN_DEFAULT = 0 / 0
+
+local function is_number_equality(lhs, rhs)
+	if type(lhs) ~= "number" or type(rhs) ~= "number" then
+		return false
+	elseif lhs ~= lhs and rhs ~= rhs then
+		return lhs ~= rhs
+	end
+
+	return math.abs(lhs - rhs) < 0.000001
+end
+
+local function assert_eq(lhs, rhs, message, level)
+	if lhs == rhs or is_number_equality(lhs, rhs) then
+		return
+	end
+
+	if message then
+		message = ": " .. message
+	else
+		message = ""
+	end
+
+	lhs = tostring(lhs)
+	rhs = tostring(rhs)
+	level = (level or 1) + 1
+
+	error(lhs .. " ~= " .. rhs .. message, level)
+end
+
+local function assert_neq(lhs, rhs, message, level)
+	if lhs ~= rhs and not is_number_equality(lhs, rhs) then
+		return
+	end
+
+	if message then
+		message = ": " .. message
+	else
+		message = ""
+	end
+
+	lhs = tostring(lhs)
+	rhs = tostring(rhs)
+	level = (level or 1) + 1
+
+	error(lhs .. " == " .. rhs .. message, level)
+end
+
+local function raw_invoke(func, ...)
+	return func(...)
+end
+
+local function assert_trap(func, ...)
+	if pcall(func, ...) then
+		error("Failed to trap", 2)
+	end
+end
+
+local function assert_return(data, wanted)
+	for i, v in ipairs(data) do
+		assert_eq(v, wanted[i], "Result mismatch at " .. i, 2)
+	end
+end
+
+local function assert_exhaustion(func, ...)
+	if pcall(func, ...) then
+		error("Failed to exhaust", 2)
+	end
+end
diff --git a/dev-test/tests/specification.rs b/dev-test/tests/specification.rs
index cb73294..e844431 100644
--- a/dev-test/tests/specification.rs
+++ b/dev-test/tests/specification.rs
@@ -17,6 +17,8 @@ use wast::{
 
 use wasm_ast::builder::TypeInfo;
 
+static ASSERTION: &str = include_str!("assertion.lua");
+
 macro_rules! write_assert_number {
 	($name:ident, $generic:ty, $reader:ty) => {
 		fn $name(data: &NanPattern<$generic>, w: &mut dyn Write) -> IResult<()> {
@@ -199,9 +201,8 @@ impl Target for LuaJIT {
 	fn write_runtime(w: &mut dyn Write) -> IResult<()> {
 		let runtime = codegen_luajit::RUNTIME;
 
-		writeln!(w, "local rt = (function() {runtime} end)()")?;
-		writeln!(w, "local loaded = {{}}")?;
-		writeln!(w, "local linked = {{}}")
+		writeln!(w, "{ASSERTION}")?;
+		writeln!(w, "local rt = (function() {runtime} end)()")
 	}
 
 	fn write_module(typed: &TypedModule, w: &mut dyn Write) -> IResult<()> {
@@ -245,9 +246,8 @@ impl Target for Luau {
 	fn write_runtime(w: &mut dyn Write) -> IResult<()> {
 		let runtime = codegen_luau::RUNTIME;
 
-		writeln!(w, "local rt = (function() {runtime} end)()")?;
-		writeln!(w, "local loaded = {{}}")?;
-		writeln!(w, "local linked = {{}}")
+		writeln!(w, "{ASSERTION}")?;
+		writeln!(w, "local rt = (function() {runtime} end)()")
 	}
 
 	fn write_module(typed: &TypedModule, w: &mut dyn Write) -> IResult<()> {
@@ -362,9 +362,13 @@ impl<T: Target> Tester<T> {
 	}
 }
 
-static DO_NOT_RUN: [&str; 4] = [
+static DO_NOT_RUN: [&str; 8] = [
 	"binary-leb128.wast",
 	"conversions.wast",
+	"float_exprs.wast",
+	"float_literals.wast",
+	"float_memory.wast",
+	"float_misc.wast",
 	"names.wast",
 	"skip-stack-guard-page.wast",
 ];