diff --git a/x-pack/plugin/sql/src/test/java/org/elasticsearch/xpack/sql/plan/logical/UnresolvedRelationTests.java b/x-pack/plugin/sql/src/test/java/org/elasticsearch/xpack/sql/plan/logical/UnresolvedRelationTests.java
index 51ea33ed22a..1712020eb7a 100644
--- a/x-pack/plugin/sql/src/test/java/org/elasticsearch/xpack/sql/plan/logical/UnresolvedRelationTests.java
+++ b/x-pack/plugin/sql/src/test/java/org/elasticsearch/xpack/sql/plan/logical/UnresolvedRelationTests.java
@@ -9,7 +9,6 @@ import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.xpack.ql.plan.TableIdentifier;
 import org.elasticsearch.xpack.ql.plan.logical.UnresolvedRelation;
 import org.elasticsearch.xpack.ql.tree.Source;
-import org.elasticsearch.xpack.ql.tree.SourceTests;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -26,12 +25,6 @@ public class UnresolvedRelationTests extends ESTestCase {
         String unresolvedMessage = randomAlphaOfLength(5);
         UnresolvedRelation relation = new UnresolvedRelation(source, table, alias, randomBoolean(), unresolvedMessage);
         List<Function<UnresolvedRelation, UnresolvedRelation>> mutators = new ArrayList<>();
-        mutators.add(r -> new UnresolvedRelation(
-            SourceTests.mutate(r.source()),
-            r.table(),
-            r.alias(),
-            r.frozen(),
-            r.unresolvedMessage()));
         mutators.add(r -> new UnresolvedRelation(
             r.source(),
             new TableIdentifier(r.source(), r.table().cluster(), r.table().index() + "m"),