diff --git a/src/mostlyai/qa/filesystem.py b/src/mostlyai/qa/filesystem.py
index aa41d30..4e66aa1 100644
--- a/src/mostlyai/qa/filesystem.py
+++ b/src/mostlyai/qa/filesystem.py
@@ -25,7 +25,7 @@
 from sklearn.decomposition import PCA
 
 
-_OLD_COL_PREFIX = r"(\w+)\."
+_OLD_COL_PREFIX = r"^(tgt|ctx|nxt)\."
 _NEW_COL_PREFIX = r"\1⁝"
 
 
diff --git a/tests/end_to_end/test_report.py b/tests/end_to_end/test_report.py
index 719043e..cefad37 100644
--- a/tests/end_to_end/test_report.py
+++ b/tests/end_to_end/test_report.py
@@ -224,3 +224,25 @@ def test_report_sequential_few_records(tmp_path):
         ctx_primary_key="id",
     )
     assert metrics is not None
+
+
+def test_odd_column_names(tmp_path):
+    values = ["a", "b"] * 50
+    df = pd.DataFrame(
+        {
+            "some.test": values,
+            "foo%bar|this-long{c[u]rly} *": values,
+            "3": values,
+        }
+    )
+    path, metrics = report(
+        syn_tgt_data=df,
+        trn_tgt_data=df,
+        statistics_path=tmp_path / "stats",
+    )
+    assert metrics is not None
+    path = report_from_statistics(
+        syn_tgt_data=df,
+        statistics_path=tmp_path / "stats",
+    )
+    assert path is not None