diff --git a/x-pack/plugin/inference/src/test/java/org/elasticsearch/xpack/inference/mapper/SemanticTextFieldMapperTests.java b/x-pack/plugin/inference/src/test/java/org/elasticsearch/xpack/inference/mapper/SemanticTextFieldMapperTests.java
index 0fab22d45d08c..47d839b515163 100644
--- a/x-pack/plugin/inference/src/test/java/org/elasticsearch/xpack/inference/mapper/SemanticTextFieldMapperTests.java
+++ b/x-pack/plugin/inference/src/test/java/org/elasticsearch/xpack/inference/mapper/SemanticTextFieldMapperTests.java
@@ -1299,7 +1299,11 @@ public void testDefaultIndexOptions() throws IOException {
             b.field("similarity", "cosine");
             b.field("element_type", "float");
             b.endObject();
-        }), useLegacyFormat, IndexVersions.SEMANTIC_TEXT_DEFAULTS_TO_BBQ_BACKPORT_8_X, IndexVersions.UPGRADE_TO_LUCENE_10_0_0);
+        }),
+            useLegacyFormat,
+            IndexVersions.SEMANTIC_TEXT_DEFAULTS_TO_BBQ_BACKPORT_8_X,
+            IndexVersionUtils.getPreviousVersion(IndexVersions.UPGRADE_TO_LUCENE_10_0_0)
+        );
         assertSemanticTextField(mapperService, "field", true, null, defaultBbqHnswSemanticTextIndexOptions());
 
         // Previous 8.x index versions do not set BBQ index options