diff --git a/server/src/test/java/org/elasticsearch/index/engine/RecoverySourcePruneMergePolicyTests.java b/server/src/test/java/org/elasticsearch/index/engine/RecoverySourcePruneMergePolicyTests.java
index da20ce717101a..d70a2002d8acf 100644
--- a/server/src/test/java/org/elasticsearch/index/engine/RecoverySourcePruneMergePolicyTests.java
+++ b/server/src/test/java/org/elasticsearch/index/engine/RecoverySourcePruneMergePolicyTests.java
@@ -372,6 +372,10 @@ private void runTimeSeriesForceMergeToOneSegment(
         final boolean pruneSequenceNumber,
         final boolean useSyntheticRecoverySource
     ) throws IOException {
+        assumeTrue(
+            "Sequence number pruning requires a feature flag",
+            IndexSettings.DISABLE_SEQUENCE_NUMBERS_FEATURE_FLAG || pruneSequenceNumber == false
+        );
         try (var dir = newDirectory()) {
             dir.setCheckIndexOnClose(false);
 
@@ -574,6 +578,10 @@ public void testWrapForMergeUnwrapsSyntheticIdStoredFieldsReader() throws IOExce
         boolean syntheticRecoverySource = randomBoolean();
         boolean pruneIdField = randomBoolean();
         boolean pruneSequenceNumber = randomBoolean();
+        assumeTrue(
+            "Sequence number pruning requires a feature flag",
+            IndexSettings.DISABLE_SEQUENCE_NUMBERS_FEATURE_FLAG || pruneSequenceNumber == false
+        );
         String pruneStoredFieldName = syntheticRecoverySource ? null : SourceFieldMapper.RECOVERY_SOURCE_NAME;
         String pruneNumericDVFieldName = syntheticRecoverySource
             ? SourceFieldMapper.RECOVERY_SOURCE_SIZE_NAME