diff --git a/Z/src/nglwidgets/CMakeLists.txt b/Z/src/nglwidgets/CMakeLists.txt
index 4c5eaa9f1..36b392b09 100755
--- a/Z/src/nglwidgets/CMakeLists.txt
+++ b/Z/src/nglwidgets/CMakeLists.txt
@@ -61,7 +61,7 @@ NGL_TARGET_LINK_LIBRARIES(nglwidgets
 NGL_INSTALL_TARGET(nglwidgets)
 
 # Unit test for PDFWidget
-IF(BUILD_TESTING)
+IF(BUILD_TESTING AND TARGET nglwidgets)
   FIND_PACKAGE(Qt6 REQUIRED COMPONENTS Test Widgets)
   ADD_EXECUTABLE(test_nglpdfwidget test_nglpdfwidget.cpp)
   TARGET_LINK_LIBRARIES(test_nglpdfwidget PRIVATE nglwidgets Qt6::Test Qt6::Widgets)