6.7.1 qtserialport: test suite fails in one unit

+ cd qtserialport-everywhere-src-6.7.1
+ /usr/bin/ctest --test-dir x86_64-redhat-linux-gnu --output-on-failure --force-new-ctest-process -j48 ' '
Internal ctest changing into directory: /home/tkloczko/rpmbuild/BUILD/qtserialport-everywhere-src-6.7.1/x86_64-redhat-linux-gnu
Test project /home/tkloczko/rpmbuild/BUILD/qtserialport-everywhere-src-6.7.1/x86_64-redhat-linux-gnu
    Start 1: tst_qserialport
    Start 2: tst_qserialportinfo
    Start 3: module_includes
1/3 Test #1: tst_qserialport ..................   Passed    0.02 sec
2/3 Test #2: tst_qserialportinfo ..............   Passed    0.03 sec
3/3 Test #3: module_includes ..................***Failed    0.76 sec
Internal cmake changing into directory: /home/tkloczko/rpmbuild/BUILD/qtserialport-everywhere-src-6.7.1/x86_64-redhat-linux-gnu/tests/auto/cmake/module_includes/build
Error: cmake execution failed
The C compiler identification is GNU 14.1.1
The CXX compiler identification is GNU 14.1.1
Detecting C compiler ABI info
Detecting C compiler ABI info - done
Check for working C compiler: /usr/bin/gcc - skipped
Detecting C compile features
Detecting C compile features - done
Detecting CXX compiler ABI info
Detecting CXX compiler ABI info - done
Check for working CXX compiler: /usr/bin/g++ - skipped
Detecting CXX compile features
Detecting CXX compile features - done
Could NOT find Qt6 (missing: Qt6_DIR)
CMake Error at /home/tkloczko/rpmbuild/BUILD/qtserialport-everywhere-src-6.7.1/x86_64-redhat-linux-gnu/lib64/cmake/Qt6SerialPort/Qt6SerialPortConfig.cmake:54 (_qt_internal_suggest_dependency_debugging):
  Unknown CMake command "_qt_internal_suggest_dependency_debugging".
Call Stack (most recent call first):
  CMakeLists.txt:6 (find_package)
CMake Error at CMakeLists.txt:6 (find_package):
  Found package configuration file:    /home/tkloczko/rpmbuild/BUILD/qtserialport-everywhere-src-6.7.1/x86_64-redhat-linux-gnu/lib64/cmake/Qt6SerialPort/Qt6SerialPortConfig.cmake  but it set Qt6SerialPort_FOUND to FALSE so package "Qt6SerialPort" is
  considered to be NOT FOUND.  Reason given by package:  Qt6SerialPort could not be found because dependency Qt6 could not be found.Configuring incomplete, errors occurred!67% tests passed, 1 tests failed out of 3Label Time Summary:
tests/auto/qserialport/tst_qserialport            =   0.02 sec*proc (1 test)
tests/auto/qserialportinfo/tst_qserialportinfo    =   0.03 sec*proc (1 test)Total Test time (real) =   0.76 secThe following tests FAILED:
          3 - module_includes (Failed)
Errors while running CTest