diff --git a/tests/auto/functional/orm/tiny/model_return_relation/CMakeLists.txt b/tests/auto/functional/orm/tiny/model_return_relation/CMakeLists.txt
index 6206e2d07..60bc0575b 100644
--- a/tests/auto/functional/orm/tiny/model_return_relation/CMakeLists.txt
+++ b/tests/auto/functional/orm/tiny/model_return_relation/CMakeLists.txt
@@ -10,3 +10,18 @@ add_test(NAME model_return_relation COMMAND model_return_relation)
 
 include(TinyTestCommon)
 tiny_configure_test(model_return_relation DEPENDS_ON_UNITTESTS INCLUDE_MODELS RUN_SERIAL)
+
+# To avoid: error: redefinition of 'bool __tls_guard'
+# Even the latest GCC v14.2.1 has still TLS wrapper related bugs if the class that
+# defines the thread_local static is templated and polymorphic. 😞
+# This is the only test case where this is happening and I didn't find any workaround
+# after 8 hours of investigation.
+# Only workaround I found is to #include the torrent_includeslist.hpp then it compiles,
+# so I'm disabling the thread_local for this test case.
+# See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66944
+# thread_local is already disabled on MSYS2 g++ so no need to target unix platform.
+if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    target_compile_definitions(model_return_relation
+        PRIVATE TINYORM_DISABLE_THREAD_LOCAL
+    )
+endif()
diff --git a/tests/auto/functional/orm/tiny/model_return_relation/model_return_relation.pro b/tests/auto/functional/orm/tiny/model_return_relation/model_return_relation.pro
index 0a03a8f3e..bdef021db 100644
--- a/tests/auto/functional/orm/tiny/model_return_relation/model_return_relation.pro
+++ b/tests/auto/functional/orm/tiny/model_return_relation/model_return_relation.pro
@@ -2,4 +2,15 @@ include($$TINYORM_SOURCE_TREE/tests/qmake/common.pri)
 include($$TINYORM_SOURCE_TREE/tests/qmake/TinyUtils.pri)
 include($$TINYORM_SOURCE_TREE/tests/models/models.pri)
 
+# To avoid: error: redefinition of 'bool __tls_guard'
+# Even the latest GCC v14.2.1 has still TLS wrapper related bugs if the class that
+# defines the thread_local static is templated and polymorphic. 😞
+# This is the only test case where this is happening and I didn't find any workaround
+# after 8 hours of investigation.
+# Only workaround I found is to #include the torrent_includeslist.hpp then it compiles,
+# so I'm disabling the thread_local for this test case.
+# See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66944
+# thread_local is already disabled on MSYS2 g++ so no need to target unix platform.
+gcc:!clang: DEFINES *= TINYORM_DISABLE_THREAD_LOCAL
+
 SOURCES += tst_model_return_relation.cpp