diff --git a/scripts/test.py b/scripts/test.py
index a0529e62b..42dab0a22 100755
--- a/scripts/test.py
+++ b/scripts/test.py
@@ -346,6 +346,9 @@ def main(argv):
         
         elif arg == '--cibw-release-2':
             env_extra['CIBW_ARCHS_LINUX'] = 'aarch64'
+            # Testing only first and last python versions because otherwise
+            # Github times out after 6h.
+            env_extra['CIBW_BUILD'] = 'cp39* cp313*'
             os_names = ['linux']
         
         elif arg == '--cibw-archs-linux':
diff --git a/tests/resources/test_4564.pdf b/tests/resources/test_4564.pdf
new file mode 100644
index 000000000..486a100f9
Binary files /dev/null and b/tests/resources/test_4564.pdf differ
diff --git a/tests/test_font.py b/tests/test_font.py
index 58396984c..4d5958cd9 100644
--- a/tests/test_font.py
+++ b/tests/test_font.py
@@ -233,8 +233,8 @@ def test_3887():
 def test_4457():
     print()
     files = (
-            ('https://arxiv.org/pdf/2504.13180', 'test_4457_a.pdf', None, 4),
-            ('https://arxiv.org/pdf/2504.13181', 'test_4457_b.pdf', None, 9),
+            ('https://github.com/user-attachments/files/20862923/test_4457_a.pdf', 'test_4457_a.pdf', None, 4),
+            ('https://github.com/user-attachments/files/20862922/test_4457_b.pdf', 'test_4457_b.pdf', None, 9),
             )
     for url, name, size, rms_after_max in files:
         path = util.download(url, name, size)
diff --git a/tests/test_general.py b/tests/test_general.py
index 0c1620a43..1288c2279 100644
--- a/tests/test_general.py
+++ b/tests/test_general.py
@@ -1894,3 +1894,16 @@ def test_4533():
     with pymupdf.open(path) as document:
         print(f'Have opened {path=}.', flush=1)
         print(f'{len(document)=}', flush=1)
+
+
+def test_4564():
+    path = os.path.normpath(f'{__file__}/../../tests/resources/test_4564.pdf')
+    print()
+    with pymupdf.open(path) as document:
+        for key in sorted(document.metadata.keys()):
+            value = document.metadata[key]
+            print(f'{key}: {value!r}')
+    if pymupdf.mupdf_version_tuple >= (1, 27):
+        assert document.metadata['producer'] == 'Adobe PSL 1.3e for Canon\x00'
+    else:
+        assert document.metadata['producer'] == 'Adobe PSL 1.3e for Canon\udcc0\udc80'