diff --git a/test/unit/CMakeLists.txt b/test/unit/CMakeLists.txt
index f73674d14..817c7da41 100644
--- a/test/unit/CMakeLists.txt
+++ b/test/unit/CMakeLists.txt
@@ -1,4 +1,6 @@
-test_case(charconv_compat)
+if(NOT HAVE_FLOAT_CHARCONV)
+  test_case(charconv_compat)
+endif()
 test_case(greek)
 test_case(hash)
 test_case(logger)