diff --git a/test/framework/src/main/java/org/elasticsearch/index/mapper/MapperTestCase.java b/test/framework/src/main/java/org/elasticsearch/index/mapper/MapperTestCase.java
index fa0f0e1b95f54..34ccc4599811b 100644
--- a/test/framework/src/main/java/org/elasticsearch/index/mapper/MapperTestCase.java
+++ b/test/framework/src/main/java/org/elasticsearch/index/mapper/MapperTestCase.java
@@ -1030,7 +1030,7 @@ public final void testMinimalIsInvalidInRoutingPath() throws IOException {
         }
     }
 
-    private String minimalIsInvalidRoutingPathErrorMessage(Mapper mapper) {
+    protected String minimalIsInvalidRoutingPathErrorMessage(Mapper mapper) {
         if (mapper instanceof FieldMapper fieldMapper && fieldMapper.fieldType().isDimension() == false) {
             return "All fields that match routing_path must be configured with [time_series_dimension: true] "
                 + "or flattened fields with a list of dimensions in [time_series_dimensions] and "