diff --git a/tests/resources/test_3687-3.epub b/tests/resources/test_3687-3.epub
new file mode 100644
index 000000000..76581a229
Binary files /dev/null and b/tests/resources/test_3687-3.epub differ
diff --git a/tests/resources/test_3687.epub b/tests/resources/test_3687.epub
new file mode 100644
index 000000000..b510dd58d
Binary files /dev/null and b/tests/resources/test_3687.epub differ
diff --git a/tests/test_textextract.py b/tests/test_textextract.py
index 2a8a25e49..ef30ca77e 100644
--- a/tests/test_textextract.py
+++ b/tests/test_textextract.py
@@ -329,3 +329,17 @@ def test_3594():
         # We expect MuPDF warnings.
         wt = pymupdf.TOOLS.mupdf_warnings()
         assert wt
+
+
+def test_3687():
+    path1 = pymupdf.open(os.path.normpath(f'{__file__}/../../tests/resources/test_3687.epub'))
+    path2 = pymupdf.open(os.path.normpath(f'{__file__}/../../tests/resources/test_3687-3.epub'))
+    for path in path1, path2:
+        print(f'Looking at {path=}.')
+        with pymupdf.open(path) as document:
+            page = document[0]
+            text = page.get_text("text")
+            print(f'{text=!s}')
+        wt = pymupdf.TOOLS.mupdf_warnings()
+        print(f'{wt=}')
+        assert wt == 'unknown epub version: 3.0'