diff --git a/configure.cmake b/configure.cmake
index 08202a703d0..d6fddad6a58 100644
--- a/configure.cmake
+++ b/configure.cmake
@@ -1456,6 +1456,11 @@ qt_configure_add_report_entry(
     MESSAGE "You should use the recommended Emscripten version ${QT_EMCC_RECOMMENDED_VERSION} with this Qt. You have ${EMCC_VERSION}."
     CONDITION WASM AND NOT ${EMCC_VERSION} MATCHES ${QT_EMCC_RECOMMENDED_VERSION}
 )
+qt_configure_add_report_entry(
+    TYPE WARNING
+    MESSAGE "Some tests might fail to build when targeting WASM without -feature-thread."
+    CONDITION WASM AND QT_BUILD_TESTS AND NOT QT_FEATURE_thread
+)
 qt_configure_add_report_entry(
     TYPE ERROR
     MESSAGE "Building Qt with C++20 is not supported with MSVC 2019."