diff --git a/tests/test_basic_flat_file.py b/tests/test_basic_flat_file.py
index 144e33f5..d7629f7f 100644
--- a/tests/test_basic_flat_file.py
+++ b/tests/test_basic_flat_file.py
@@ -36,7 +36,7 @@
 EXEMPTED_VARIABLES += [
     variable
     for variable in taxcalc_variable_metadata["read"]
-    if variable.endswith("_p") or variable.endswith("_s")
+    if variable.endswith("p") or variable.endswith("s")
 ]