diff --git a/e2e/whole_cluster_test.go b/e2e/whole_cluster_test.go
index bff4054c..d22c3b1f 100644
--- a/e2e/whole_cluster_test.go
+++ b/e2e/whole_cluster_test.go
@@ -9,8 +9,10 @@ import (
 	"time"
 
 	"github.com/jackc/pgx/v5"
-	controlplane "github.com/pgEdge/control-plane/api/apiv1/gen/control_plane"
 	"github.com/stretchr/testify/require"
+
+	controlplane "github.com/pgEdge/control-plane/api/apiv1/gen/control_plane"
+	"github.com/pgEdge/control-plane/client"
 )
 
 // TestWholeCluster deploys one instance to each host in the cluster.
@@ -81,30 +83,58 @@ func TestWholeCluster(t *testing.T) {
 				continue
 			}
 
-			for instance := range db.GetInstances(WithNode(read.Name)) {
-				t.Logf("validating table on node %s, instance %s with role %s", read.Name, instance.ID, *instance.Postgres.Role)
+			primary := db.GetInstance(And(WithNode(read.Name), WithRole(client.RolePrimary)))
+			require.NotNil(t, primary)
+
+			t.Logf("validating table on node %s, instance %s with role %s", read.Name, primary.ID, *primary.Postgres.Role)
+
+			readOpts := ConnectionOptions{
+				Instance: primary,
+				Username: username,
+				Password: password,
+			}
+			db.WithConnection(ctx, readOpts, t, func(conn *pgx.Conn) {
+				t.Log("waiting for replication to finish")
+
+				var synced bool
+				row := conn.QueryRow(ctx, "CALL spock.wait_for_sync_event(true, $1, $2::pg_lsn, 30);", write.Name, syncLSN)
+
+				require.NoError(t, row.Scan(&synced))
+				require.True(t, synced)
+
+				t.Log("selecting test data")
+
+				var actual string
+				row = conn.QueryRow(ctx, fmt.Sprintf(`SELECT data FROM %s WHERE id = 1;`, write.Name))
+
+				require.NoError(t, row.Scan(&actual))
+				require.Equal(t, "test", actual)
+			})
+
+			for replica := range db.GetInstances(And(WithNode(read.Name), WithRole(client.RoleReplica))) {
+				t.Logf("validating table on node %s, instance %s with role %s", read.Name, replica.ID, *replica.Postgres.Role)
 
 				readOpts := ConnectionOptions{
-					Instance: instance,
+					Instance: replica,
 					Username: username,
 					Password: password,
 				}
 				db.WithConnection(ctx, readOpts, t, func(conn *pgx.Conn) {
-					t.Log("waiting for replication to finish")
+					t.Log("polling until replica syncs to primary")
 
+					deadline := time.Now().Add(5 * time.Second)
 					var synced bool
-					row := conn.QueryRow(ctx, "CALL spock.wait_for_sync_event(true, $1, $2::pg_lsn, 30);", write.Name, syncLSN)
-
-					require.NoError(t, row.Scan(&synced))
+					for !synced && time.Now().Before(deadline) {
+						var actual string
+						row := conn.QueryRow(ctx, fmt.Sprintf(`SELECT data FROM %s WHERE id = 1;`, write.Name))
+						err := row.Scan(&actual)
+						if err != nil || actual != "test" {
+							time.Sleep(500 * time.Millisecond)
+						} else {
+							synced = true
+						}
+					}
 					require.True(t, synced)
-
-					t.Log("selecting test data")
-
-					var actual string
-					row = conn.QueryRow(ctx, fmt.Sprintf(`SELECT data FROM %s WHERE id = 1;`, write.Name))
-
-					require.NoError(t, row.Scan(&actual))
-					require.Equal(t, "test", actual)
 				})
 			}
 		}