diff --git a/spacy/tests/lang/sv/test_prefix_suffix_infix.py b/spacy/tests/lang/sv/test_prefix_suffix_infix.py
index bbb0ff415..0aa495992 100644
--- a/spacy/tests/lang/sv/test_prefix_suffix_infix.py
+++ b/spacy/tests/lang/sv/test_prefix_suffix_infix.py
@@ -32,3 +32,10 @@ def test_tokenizer_splits_comma_infix(sv_tokenizer, text):
 def test_tokenizer_splits_ellipsis_infix(sv_tokenizer, text):
     tokens = sv_tokenizer(text)
     assert len(tokens) == 3
+
+
+@pytest.mark.issue(12311)
+@pytest.mark.parametrize("text", ["99:e", "c:a", "EU:s", "Maj:t"])
+def test_sv_tokenizer_handles_colon(sv_tokenizer, text):
+    tokens = sv_tokenizer(text)
+    assert len(tokens) == 1