diff --git a/src/calibre/test_build.py b/src/calibre/test_build.py
index ec8ebce75e..db92a9b920 100644
--- a/src/calibre/test_build.py
+++ b/src/calibre/test_build.py
@@ -223,26 +223,28 @@ class BuildTest(unittest.TestCase):
         if iswindows:
             from PyQt5.Qt import QtWin
             QtWin
-        p = QWebEnginePage()
+        if has_headless:
+            # Causes crash on exit under windows+cygwin+ssh
+            p = QWebEnginePage()
 
-        def callback(result):
-            callback.result = result
-            if hasattr(print_callback, 'result'):
-                Application.instance().quit()
+            def callback(result):
+                callback.result = result
+                if hasattr(print_callback, 'result'):
+                    Application.instance().quit()
 
-        def print_callback(result):
-            print_callback.result = result
-            if hasattr(callback, 'result'):
-                Application.instance().quit()
+            def print_callback(result):
+                print_callback.result = result
+                if hasattr(callback, 'result'):
+                    Application.instance().quit()
 
-        p.runJavaScript('1 + 1', callback)
-        p.printToPdf(print_callback)
-        QTimer.singleShot(5000, lambda: Application.instance().quit())
-        app.exec_()
-        self.assertEqual(callback.result, 2)
-        self.assertIn(b'Skia/PDF', bytes(print_callback.result))
+            p.runJavaScript('1 + 1', callback)
+            p.printToPdf(print_callback)
+            QTimer.singleShot(5000, lambda: Application.instance().quit())
+            app.exec_()
+            self.assertEqual(callback.result, 2)
+            self.assertIn(b'Skia/PDF', bytes(print_callback.result))
+            del p
         del na
-        del p
         del app
         del QWebEnginePage