diff --git a/java-bigquery-jdbc/.cloudbuild/scripts/jdbc-nightly.sh b/java-bigquery-jdbc/.cloudbuild/scripts/jdbc-nightly.sh
index e82560622e4a..91c22ee656e1 100644
--- a/java-bigquery-jdbc/.cloudbuild/scripts/jdbc-nightly.sh
+++ b/java-bigquery-jdbc/.cloudbuild/scripts/jdbc-nightly.sh
@@ -5,4 +5,4 @@ source .kokoro/common.sh
 install_modules java-bigquery-jdbc
 
 cd ${ROOT_FOLDER}/java-bigquery-jdbc
-make integration-test test=ITNightlyTests
+make integration-test test=ITPresubmitTests,ITNightlyTests
diff --git a/java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/it/suites/ITNightlyTests.java b/java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/it/suites/ITNightlyTests.java
index b7ffb662b286..ebe2526ffb1d 100644
--- a/java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/it/suites/ITNightlyTests.java
+++ b/java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/it/suites/ITNightlyTests.java
@@ -16,22 +16,15 @@
 
 package com.google.cloud.bigquery.jdbc.it.suites;
 
-import com.google.cloud.bigquery.jdbc.it.ITAuthTests;
-import com.google.cloud.bigquery.jdbc.it.ITBigQueryJDBCTest;
-import com.google.cloud.bigquery.jdbc.it.ITJdbcTimestampPicosTest;
 import com.google.cloud.bigquery.jdbc.it.ITNightlyBigQueryTest;
 import com.google.cloud.bigquery.jdbc.it.ITOpenTelemetryTest;
-import com.google.cloud.bigquery.jdbc.it.ITPcntTest;
 import org.junit.platform.suite.api.SelectClasses;
 import org.junit.platform.suite.api.Suite;
 
+/**
+ * Nightly-only integration tests. Run together with {@link ITPresubmitTests}; classes already in
+ * that suite are intentionally not repeated here.
+ */
 @Suite
-@SelectClasses({
-  ITAuthTests.class,
-  ITBigQueryJDBCTest.class,
-  ITJdbcTimestampPicosTest.class,
-  ITNightlyBigQueryTest.class,
-  ITOpenTelemetryTest.class,
-  ITPcntTest.class
-})
+@SelectClasses({ITNightlyBigQueryTest.class, ITOpenTelemetryTest.class})
 public class ITNightlyTests {}