diff --git a/loki/transformations/build_system/tests/test_file_write.py b/loki/transformations/build_system/tests/test_file_write.py
index 16335c659..8a0de54e4 100644
--- a/loki/transformations/build_system/tests/test_file_write.py
+++ b/loki/transformations/build_system/tests/test_file_write.py
@@ -59,11 +59,11 @@ def test_file_write_module_imports(frontend, tmp_path, enable_imports, import_le
     else:
         import_stmt = "use a_mod\n    use b_mod"
 
+    module_import_stmt = ""
+    routine_import_stmt = ""
     if import_level == 'module':
         module_import_stmt = import_stmt
-        routine_import_stmt = ""
     elif import_level == 'subroutine':
-        module_import_stmt = ""
         routine_import_stmt = import_stmt
 
     fcode_mod_c = f"""
@@ -82,7 +82,7 @@ def test_file_write_module_imports(frontend, tmp_path, enable_imports, import_le
 end module c_mod
 """
 
-    fcode_mod_d = f"""
+    fcode_mod_d = """
 module d_mod
     implicit none
 contains