diff --git a/muted-tests.yml b/muted-tests.yml
index a3126193b6523..dfbc53a94d39e 100644
--- a/muted-tests.yml
+++ b/muted-tests.yml
@@ -449,33 +449,6 @@ tests:
 - class: org.elasticsearch.aggregations.bucket.AggregationReductionCircuitBreakingIT
   method: testCBTrippingOnReduction
   issue: https://github.com/elastic/elasticsearch/issues/134902
-- class: org.elasticsearch.upgrades.FullClusterRestartIT
-  method: testEmptyShard {cluster=UPGRADED}
-  issue: https://github.com/elastic/elasticsearch/issues/135951
-- class: org.elasticsearch.upgrades.FullClusterRestartIT
-  method: testSearch {cluster=UPGRADED}
-  issue: https://github.com/elastic/elasticsearch/issues/135927
-- class: org.elasticsearch.upgrades.FullClusterRestartIT
-  method: testPersianAnalyzerBWC {cluster=UPGRADED}
-  issue: https://github.com/elastic/elasticsearch/issues/135930
-- class: org.elasticsearch.upgrades.FullClusterRestartDownsampleIT
-  method: testRollupIndex {cluster=UPGRADED}
-  issue: https://github.com/elastic/elasticsearch/issues/135906
-- class: org.elasticsearch.upgrades.FullClusterRestartIT
-  method: testSystemIndexMetadataIsUpgraded {cluster=UPGRADED}
-  issue: https://github.com/elastic/elasticsearch/issues/135923
-- class: org.elasticsearch.upgrades.FullClusterRestartIT
-  method: testNewReplicas {cluster=UPGRADED}
-  issue: https://github.com/elastic/elasticsearch/issues/135956
-- class: org.elasticsearch.upgrades.FullClusterRestartIT
-  method: testPeerRecoveryRetentionLeases {cluster=UPGRADED}
-  issue: https://github.com/elastic/elasticsearch/issues/135929
-- class: org.elasticsearch.upgrades.FullClusterRestartIT
-  method: testTurnOffTranslogRetentionAfterUpgraded {cluster=UPGRADED}
-  issue: https://github.com/elastic/elasticsearch/issues/135958
-- class: org.elasticsearch.upgrades.FullClusterRestartIT
-  method: testOperationBasedRecovery {cluster=UPGRADED}
-  issue: https://github.com/elastic/elasticsearch/issues/135944
 
 # Examples:
 #
diff --git a/qa/full-cluster-restart/src/javaRestTest/java/org/elasticsearch/upgrades/FullClusterRestartDownsampleIT.java b/qa/full-cluster-restart/src/javaRestTest/java/org/elasticsearch/upgrades/FullClusterRestartDownsampleIT.java
index 10bbd3dc42e67..3a65f10e07d77 100644
--- a/qa/full-cluster-restart/src/javaRestTest/java/org/elasticsearch/upgrades/FullClusterRestartDownsampleIT.java
+++ b/qa/full-cluster-restart/src/javaRestTest/java/org/elasticsearch/upgrades/FullClusterRestartDownsampleIT.java
@@ -57,7 +57,7 @@ private static ElasticsearchCluster buildCluster() {
             .apply(() -> clusterConfig)
             .feature(FeatureFlag.TIME_SERIES_MODE);
 
-        if (oldVersion.before(Version.fromString("8.18.0"))) {
+        if (oldVersion.before(Version.fromString("8.18.0")) || isOldClusterDetachedVersion()) {
             cluster.jvmArg("-da:org.elasticsearch.index.mapper.DocumentMapper");
             cluster.jvmArg("-da:org.elasticsearch.index.mapper.MapperService");
         }
diff --git a/qa/full-cluster-restart/src/javaRestTest/java/org/elasticsearch/upgrades/FullClusterRestartIT.java b/qa/full-cluster-restart/src/javaRestTest/java/org/elasticsearch/upgrades/FullClusterRestartIT.java
index b0fda4051bf4b..b5a0928cb21a7 100644
--- a/qa/full-cluster-restart/src/javaRestTest/java/org/elasticsearch/upgrades/FullClusterRestartIT.java
+++ b/qa/full-cluster-restart/src/javaRestTest/java/org/elasticsearch/upgrades/FullClusterRestartIT.java
@@ -118,7 +118,7 @@ private static ElasticsearchCluster buildCluster() {
             .apply(() -> clusterConfig)
             .feature(FeatureFlag.TIME_SERIES_MODE);
 
-        if (oldVersion.before(Version.fromString("8.18.0"))) {
+        if (oldVersion.before(Version.fromString("8.18.0")) || isOldClusterDetachedVersion()) {
             cluster.jvmArg("-da:org.elasticsearch.index.mapper.DocumentMapper");
             cluster.jvmArg("-da:org.elasticsearch.index.mapper.MapperService");
         }