diff --git a/sv-parser-pp/src/preprocess.rs b/sv-parser-pp/src/preprocess.rs
index 0d36ca5..344feef 100644
--- a/sv-parser-pp/src/preprocess.rs
+++ b/sv-parser-pp/src/preprocess.rs
@@ -1095,7 +1095,7 @@ mod tests {
     #[test]
     fn escaped_identifier() {
         let (ret, _) = preprocess(
-            testfile_path("test12.sv"),
+            testfile_path("escaped_identifier.sv"),
             &HashMap::new(),
             &[] as &[String],
             false,
@@ -1104,7 +1104,7 @@ mod tests {
         .unwrap();
         assert_eq!(
             ret.text(),
-            testfile_contents("expected/escaped_identifier")
+            testfile_contents("expected/escaped_identifier.sv")
         );
     }
 
diff --git a/sv-parser-pp/testcases/test12.sv b/sv-parser-pp/testcases/escaped_identifier.sv
similarity index 100%
rename from sv-parser-pp/testcases/test12.sv
rename to sv-parser-pp/testcases/escaped_identifier.sv
diff --git a/sv-parser-pp/testcases/expected/escaped_identifier b/sv-parser-pp/testcases/expected/escaped_identifier.sv
similarity index 100%
rename from sv-parser-pp/testcases/expected/escaped_identifier
rename to sv-parser-pp/testcases/expected/escaped_identifier.sv