diff --git a/test/unit_test/static/quantity_test.cpp b/test/unit_test/static/quantity_test.cpp
index 11721955..ed038077 100644
--- a/test/unit_test/static/quantity_test.cpp
+++ b/test/unit_test/static/quantity_test.cpp
@@ -20,6 +20,8 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
+#include <mp-units/bits/external/hacks.h>
+//
 #include "test_tools.h"
 #include <limits>
 #include <utility>
@@ -402,6 +404,8 @@ static_assert((std::uint8_t(255) * m %= 257 * m).numerical_value_in(m) != [] {
 // TODO ICE
 // (https://developercommunity2.visualstudio.com/t/ICE-on-a-constexpr-operator-in-mp-unit/1302907)
 #ifndef MP_UNITS_COMP_MSVC
+// clang-17 with modules build on ignores disabling conversion warnings
+#if !(defined MP_UNITS_COMP_CLANG && MP_UNITS_COMP_CLANG < 18 && defined MP_UNITS_MODULES)
 // next two lines trigger conversions warnings
 // (warning disabled in CMake for this file)
 static_assert((22 * m *= 33.33).numerical_value_in(m) == 733);
@@ -409,6 +413,7 @@ static_assert((22 * m /= 3.33).numerical_value_in(m) == 6);
 static_assert((22 * m *= 33.33 * one).numerical_value_in(m) == 733);
 static_assert((22 * m /= 3.33 * one).numerical_value_in(m) == 6);
 #endif
+#endif
 
 template<template<auto, typename> typename Q>
 concept invalid_compound_assignments = requires() {