diff --git a/tests/test_specific_cases.py b/tests/test_specific_cases.py
index 7bb2f39..6d58f39 100644
--- a/tests/test_specific_cases.py
+++ b/tests/test_specific_cases.py
@@ -337,4 +337,10 @@ def test_large_selfies_decoding():
     large_selfies = "[C]" * 1024
     expected_smiles = "C" * 1024
 
-    assert decode_eq(large_selfies, expected_smiles)
\ No newline at end of file
+    assert decode_eq(large_selfies, expected_smiles)
+
+def test_novel_charged_symbols():
+    """Test decoding of updated constraints for charged atoms (update in 2.2.0)."""
+    assert decode_eq("[N][#C+1][#NH1][#C@H1]", "N#[C+1]")
+    assert decode_eq("[O+1][=P+1][#P-1][#C@@]", "[O+1]=[P+1]=[P-1]=[C@@]")
+    assert decode_eq("[=C-1][#S+1][#B]", "[C-1]#[S+1]=B")