diff --git a/backend/pashub_fetcher/tests/test_core_files.py b/backend/pashub_fetcher/tests/test_core_files.py
index c6970def..85e7607e 100644
--- a/backend/pashub_fetcher/tests/test_core_files.py
+++ b/backend/pashub_fetcher/tests/test_core_files.py
@@ -119,3 +119,14 @@ def test_core_file_for_ioe_substring_returns_improvement_option_evaluation() ->
 
     # Assert
     assert result == CoreFiles.IMPROVEMENT_OPTION_EVALUATION
+
+
+def test_core_file_for_mtip_substring_returns_medium_term_improvement_plan() -> None:
+    # Arrange
+    filename = "60800802 - NG4 4HD - Medium Term Improvement Plan IOE.pdf"
+
+    # Act
+    result = core_file_for(filename)
+
+    # Assert
+    assert result == CoreFiles.MEDIUM_TERM_IMPROVEMENT_PLAN