diff --git a/tests/isolation_provider/test_qubes.py b/tests/isolation_provider/test_qubes.py
index 42d23eb..d45db82 100644
--- a/tests/isolation_provider/test_qubes.py
+++ b/tests/isolation_provider/test_qubes.py
@@ -1,9 +1,13 @@
 import pytest
+from pytest_mock import MockerFixture
 
-from dangerzone.isolation_provider.qubes import Qubes
+from dangerzone.conversion import errors
+from dangerzone.document import Document
+from dangerzone.isolation_provider.base import IsolationProvider
+from dangerzone.isolation_provider.qubes import Qubes, running_on_qubes
 
 # XXX Fixtures used in abstract Test class need to be imported regardless
-from .. import pdf_11k_pages, sanitized_text, uncommon_text
+from .. import pdf_11k_pages, sample_doc, sanitized_text, uncommon_text
 from .base import IsolationProviderTest
 
 
@@ -12,5 +16,19 @@ def provider() -> Qubes:
     return Qubes()
 
 
+@pytest.mark.skipif(not running_on_qubes(), reason="Not on a Qubes system")
 class TestQubes(IsolationProviderTest):
-    pass
+    def test_max_pages_client_side_enforcement(
+        self,
+        sample_doc: str,
+        provider: Qubes,
+        mocker: MockerFixture,
+    ) -> None:
+        provider.progress_callback = mocker.MagicMock()
+        mocker.patch(
+            "dangerzone.conversion.errors.MAX_PAGES", 1
+        )  # sample_doc has 4 pages > 1
+        doc = Document(sample_doc)
+        with pytest.raises(errors.MaxPagesException):
+            success = provider._convert(doc, ocr_lang=None)
+            assert not success