diff --git a/app/build_grantlee_qt6.sh b/app/build_grantlee_qt6.sh
index 356e865e4..c496e8e3c 100755
--- a/app/build_grantlee_qt6.sh
+++ b/app/build_grantlee_qt6.sh
@@ -66,6 +66,18 @@ for p in Path('.').rglob('*'):
                 print('Patched', p)
         except Exception as e:
             print('Skipping', p, 'error', e)
+
+# ensure files linking to Qt6::Test have a find_package(Qt6 Test REQUIRED)
+for p in Path('.').rglob('*'):
+    if p.is_file() and (p.name=='CMakeLists.txt' or p.suffix=='.cmake'):
+        try:
+            s = p.read_text()
+            if 'Qt6::Test' in s and 'find_package(Qt6 Test' not in s:
+                s = 'find_package(Qt6 Test REQUIRED)\n' + s
+                p.write_text(s)
+                print('Inserted find_package(Qt6 Test REQUIRED) in', p)
+        except Exception as e:
+            print('Skipping', p, 'error', e)
 PY
 
 popd >/dev/null