diff --git a/basis/math/floats/env/x86/x86-tests.factor b/basis/math/floats/env/x86/x86-tests.factor
index 928c5021c8..4a77af9856 100644
--- a/basis/math/floats/env/x86/x86-tests.factor
+++ b/basis/math/floats/env/x86/x86-tests.factor
@@ -1,21 +1,14 @@
 USING: math.floats.env math.floats.env.x86 tools.test
-alien.c-types alien.syntax classes.struct compiler.test
-math kernel sequences ;
+classes.struct cpu.x86.assembler cpu.x86.assembler.operands
+compiler.test math kernel sequences alien alien.c-types ;
 IN: math.floats.env.x86.tests
 
-! the sqrtl function is really long double sqrtl ( long double x ) 
-! calling it as if it had a void return leaves the return value on
-! the x87 stack, so 9 calls will be guaranteed to cause a stack
-! fault
-STRUCT: fake-long-double { x char[20] } ;
-FUNCTION-ALIAS: busted-sqrtl
-    void sqrtl ( fake-long-double x ) ;
 
 [ t ] [
-    [
-        [
-            9 [ fake-long-double <struct> busted-sqrtl ] times
-        ] collect-fp-exceptions
-    ] compile-call
+    [ [
+        void { } cdecl [
+            9 [ FLDZ ] times
+        ] alien-assembly
+    ] compile-call ] collect-fp-exceptions
     +fp-x87-stack-fault+ swap member?
 ] unit-test