diff --git a/hibernate-core/src/main/java/org/hibernate/engine/jdbc/env/internal/JdbcEnvironmentInitiator.java b/hibernate-core/src/main/java/org/hibernate/engine/jdbc/env/internal/JdbcEnvironmentInitiator.java
index ac6d814599f0..0b0e7c620fbc 100644
--- a/hibernate-core/src/main/java/org/hibernate/engine/jdbc/env/internal/JdbcEnvironmentInitiator.java
+++ b/hibernate-core/src/main/java/org/hibernate/engine/jdbc/env/internal/JdbcEnvironmentInitiator.java
@@ -128,12 +128,7 @@ public JdbcEnvironment initiateService(Map<String, Object> configurationValues,
 					explicitDatabaseMinorVersion,
 					explicitDatabaseVersion);
 		}
-		else if ( explicitDialectConfiguration(
-				configurationValues,
-				explicitDatabaseName,
-				explicitDatabaseMajorVersion,
-				explicitDatabaseMinorVersion,
-				explicitDatabaseVersion) ) {
+		else if ( explicitDialectConfiguration( explicitDatabaseName, configurationValues ) ) {
 			return getJdbcEnvironmentWithExplicitConfiguration(
 					configurationValues,
 					registry,
@@ -394,14 +389,9 @@ private static void logDatabaseAndDriver(DatabaseMetaData dbmd) throws SQLExcept
 		}
 	}
 
-	private static boolean explicitDialectConfiguration(
-			Map<String, Object> configurationValues,
-			String explicitDatabaseName,
-			Integer explicitDatabaseMajorVersion,
-			Integer explicitDatabaseMinorVersion,
-			String explicitDatabaseVersion) {
-		return ( isNotEmpty(explicitDatabaseVersion) || explicitDatabaseMajorVersion != null || explicitDatabaseMinorVersion != null )
-			&& ( isNotEmpty(explicitDatabaseName) || isNotNullAndNotEmpty( configurationValues.get(DIALECT) ) );
+	private static boolean explicitDialectConfiguration(String explicitDatabaseName,
+			Map<String, Object> configurationValues) {
+		return isNotEmpty( explicitDatabaseName ) || isNotNullAndNotEmpty( configurationValues.get( DIALECT ) );
 	}
 
 	private static boolean isNotNullAndNotEmpty(Object o) {
@@ -502,7 +492,7 @@ public DialectResolutionInfoImpl(
 				String databaseName,
 				String databaseVersion,
 				int databaseMajorVersion,
-				int databaseMinorVersion, 
+				int databaseMinorVersion,
 				int databaseMicroVersion,
 				String driverName,
 				int driverMajorVersion,
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/boot/database/metadata/MetadataAccessTests.java b/hibernate-core/src/test/java/org/hibernate/orm/test/boot/database/metadata/MetadataAccessTests.java
index 11db3d4c0404..601cd48b410f 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/boot/database/metadata/MetadataAccessTests.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/boot/database/metadata/MetadataAccessTests.java
@@ -45,7 +45,8 @@ void testAccessAllowed() {
 		registryBuilder.applySetting( AvailableSettings.JAKARTA_JDBC_PASSWORD, TestingDatabaseInfo.PASS );
 
 		// make certain there is no explicit dialect configured
-		assertThat( registryBuilder.getSettings() ).doesNotContainKey( JdbcSettings.DIALECT );
+		assertThat( registryBuilder.getSettings() )
+				.doesNotContainKeys( JdbcSettings.DIALECT, JdbcSettings.JAKARTA_HBM2DDL_DB_NAME );
 
 		try (StandardServiceRegistry registry = registryBuilder.build()) {
 			final JdbcEnvironment jdbcEnvironment = registry.getService( JdbcEnvironment.class );
@@ -62,6 +63,8 @@ void testAccessDisabledExplicitDialect() {
 
 		registryBuilder.applySetting( JdbcSettings.ALLOW_METADATA_ON_BOOT, false );
 		registryBuilder.applySetting( JdbcSettings.DIALECT, "org.hibernate.dialect.OracleDialect" );
+		assertThat( registryBuilder.getSettings() )
+				.doesNotContainKeys( JdbcSettings.JAKARTA_HBM2DDL_DB_NAME );
 
 		try (StandardServiceRegistry registry = registryBuilder.build()) {
 			final JdbcEnvironment jdbcEnvironment = registry.getService( JdbcEnvironment.class );
@@ -71,10 +74,29 @@ void testAccessDisabledExplicitDialect() {
 	}
 
 	@Test
-	void testAccessDisabledNoDialect() {
+	@Jira("https://hibernate.atlassian.net/browse/HHH-18079")
+	void testAccessDisabledExplicitProductName() {
 		final StandardServiceRegistryBuilder registryBuilder = new StandardServiceRegistryBuilder();
 		registryBuilder.clearSettings();
-		assertThat( registryBuilder.getSettings() ).doesNotContainKey( JdbcSettings.DIALECT );
+
+		registryBuilder.applySetting( JdbcSettings.ALLOW_METADATA_ON_BOOT, false );
+		registryBuilder.applySetting( JdbcSettings.JAKARTA_HBM2DDL_DB_NAME, "Oracle" );
+		assertThat( registryBuilder.getSettings() )
+				.doesNotContainKeys( JdbcSettings.DIALECT );
+
+		try (StandardServiceRegistry registry = registryBuilder.build()) {
+			final JdbcEnvironment jdbcEnvironment = registry.getService( JdbcEnvironment.class );
+			final Dialect dialect = jdbcEnvironment.getDialect();
+			assertThat( dialect ).isInstanceOf( OracleDialect.class );
+		}
+	}
+
+	@Test
+	void testAccessDisabledNoDialectNorProductName() {
+		final StandardServiceRegistryBuilder registryBuilder = new StandardServiceRegistryBuilder();
+		registryBuilder.clearSettings();
+		assertThat( registryBuilder.getSettings() )
+				.doesNotContainKeys( JdbcSettings.DIALECT, JdbcSettings.JAKARTA_HBM2DDL_DB_NAME );
 
 		registryBuilder.applySetting( JdbcSettings.ALLOW_METADATA_ON_BOOT, false );
 		try (StandardServiceRegistry registry = registryBuilder.build()) {