diff --git a/testcrate/src/lib.rs b/testcrate/src/lib.rs
index 2f1b6787..cc9e7393 100644
--- a/testcrate/src/lib.rs
+++ b/testcrate/src/lib.rs
@@ -337,14 +337,3 @@ macro_rules! apfloat_fallback {
         $apfloat_op($($arg),+)
     }};
 }
-
-// FIXME(f16_f128): MSVC is unable to link the mul and div symbols required for this test.
-// `__multf3` is now available in nightly, but `__divtf3` is not yet. Provide a fallback until
-// that happens.
-#[no_mangle]
-#[linkage = "weak"]
-#[cfg(target_env = "msvc")]
-#[cfg(all(feature = "mangled-names", not(feature = "no-f16-f128")))]
-pub extern "C" fn __divtf3(a: f128, b: f128) -> f128 {
-    compiler_builtins::float::div::__divtf3(a, b)
-}
diff --git a/testcrate/tests/float_pow.rs b/testcrate/tests/float_pow.rs
index c5ed2616..c50b81a4 100644
--- a/testcrate/tests/float_pow.rs
+++ b/testcrate/tests/float_pow.rs
@@ -68,3 +68,14 @@ pow! {
 pow! {
     f128, 1e-36, __powikf2, not(feature = "no-sys-f128");
 }
+
+// FIXME(f16_f128): MSVC is unable to link the mul and div symbols required for this test.
+// `__multf3` is now available in nightly, but `__divtf3` is not yet. Provide a fallback until
+// that happens.
+#[no_mangle]
+#[linkage = "weak"]
+#[cfg(target_env = "msvc")]
+#[cfg(all(feature = "mangled-names", not(feature = "no-f16-f128")))]
+pub extern "C" fn __divtf3(a: f128, b: f128) -> f128 {
+    compiler_builtins::float::div::__divtf3(a, b)
+}