diff --git a/client/client_test.go b/client/client_test.go
index 5f00b05d1..aaf2bec47 100644
--- a/client/client_test.go
+++ b/client/client_test.go
@@ -855,7 +855,7 @@ func TestHTTPClusterClientAutoSyncFail(t *testing.T) {
 	}
 
 	err = hc.AutoSync(context.Background(), time.Hour)
-	if err.Error() != ErrClusterUnavailable.Error() {
+	if !strings.HasPrefix(err.Error(), ErrClusterUnavailable.Error()) {
 		t.Fatalf("incorrect error value: want=%v got=%v", ErrClusterUnavailable, err)
 	}
 }
diff --git a/client/cluster_error.go b/client/cluster_error.go
index aef5bf755..34618cdbd 100644
--- a/client/cluster_error.go
+++ b/client/cluster_error.go
@@ -21,7 +21,11 @@ type ClusterError struct {
 }
 
 func (ce *ClusterError) Error() string {
-	return ErrClusterUnavailable.Error()
+	s := ErrClusterUnavailable.Error()
+	for i, e := range ce.Errors {
+		s += fmt.Sprintf("; error #%d: %s\n", i, e)
+	}
+	return s
 }
 
 func (ce *ClusterError) Detail() string {