diff --git a/xds/src/main/java/io/grpc/xds/ClusterImplLoadBalancer.java b/xds/src/main/java/io/grpc/xds/ClusterImplLoadBalancer.java
index d00779a336..5e167fc498 100644
--- a/xds/src/main/java/io/grpc/xds/ClusterImplLoadBalancer.java
+++ b/xds/src/main/java/io/grpc/xds/ClusterImplLoadBalancer.java
@@ -20,6 +20,7 @@ import static com.google.common.base.Preconditions.checkNotNull;
 import static io.grpc.xds.XdsSubchannelPickers.BUFFER_PICKER;
 
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.MoreObjects;
 import com.google.common.base.Strings;
 import io.grpc.Attributes;
 import io.grpc.ClientStreamTracer;
@@ -322,6 +323,11 @@ final class ClusterImplLoadBalancer extends LoadBalancer {
         }
         return result;
       }
+
+      @Override
+      public String toString() {
+        return MoreObjects.toStringHelper(this).add("delegate", delegate).toString();
+      }
     }
   }
 
diff --git a/xds/src/main/java/io/grpc/xds/ClusterManagerLoadBalancer.java b/xds/src/main/java/io/grpc/xds/ClusterManagerLoadBalancer.java
index 69238c39dd..8bd7aca172 100644
--- a/xds/src/main/java/io/grpc/xds/ClusterManagerLoadBalancer.java
+++ b/xds/src/main/java/io/grpc/xds/ClusterManagerLoadBalancer.java
@@ -24,6 +24,7 @@ import static io.grpc.ConnectivityState.TRANSIENT_FAILURE;
 import static io.grpc.xds.XdsSubchannelPickers.BUFFER_PICKER;
 
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.MoreObjects;
 import io.grpc.ConnectivityState;
 import io.grpc.InternalLogId;
 import io.grpc.LoadBalancer;
@@ -151,6 +152,11 @@ class ClusterManagerLoadBalancer extends LoadBalancer {
           }
           return delegate.pickSubchannel(args);
         }
+
+        @Override
+        public String toString() {
+          return MoreObjects.toStringHelper(this).add("pickers", childPickers).toString();
+        }
       };
       helper.updateBalancingState(overallState, picker);
     }