diff --git a/hibernate-reactive-core/src/main/java/org/hibernate/reactive/pool/impl/ReactiveConnectionPoolInitiator.java b/hibernate-reactive-core/src/main/java/org/hibernate/reactive/pool/impl/ReactiveConnectionPoolInitiator.java
index 1e141939f..407ced196 100644
--- a/hibernate-reactive-core/src/main/java/org/hibernate/reactive/pool/impl/ReactiveConnectionPoolInitiator.java
+++ b/hibernate-reactive-core/src/main/java/org/hibernate/reactive/pool/impl/ReactiveConnectionPoolInitiator.java
@@ -40,7 +40,7 @@ public ReactiveConnectionPool initiateService(Map configurationValues, ServiceRe
 		Object configValue = configurationValues.get( Settings.SQL_CLIENT_POOL );
 
 		String dbType = (String) configurationValues.get( "db" );
-		if ( dbType.equalsIgnoreCase( "h2" ) ) {
+		if ( dbType != null && dbType.equalsIgnoreCase( "h2" ) ) {
 			configValue = "org.hibernate.reactive.pool.impl.H2SqlClientPool";
 		}
 
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BaseReactiveTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BaseReactiveTest.java
index d364cca07..5c1db2db0 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BaseReactiveTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BaseReactiveTest.java
@@ -136,6 +136,8 @@ protected Configuration constructConfiguration() {
 			configuration.setProperty( Settings.HBM2DDL_IMPORT_FILES, "/db2.sql" );
 			doneTablespace = true;
 		}
+
+		configuration.setProperty( Settings.URL, DatabaseConfiguration.getJdbcUrl() );
 		//Use JAVA_TOOL_OPTIONS='-Dhibernate.show_sql=true'
 		configuration.setProperty( Settings.SHOW_SQL, System.getProperty(Settings.SHOW_SQL, "false") );
 		configuration.setProperty( Settings.FORMAT_SQL, System.getProperty(Settings.FORMAT_SQL, "false") );
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BatchQueryOnConnectionTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BatchQueryOnConnectionTest.java
index 364845c91..bf5520869 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BatchQueryOnConnectionTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BatchQueryOnConnectionTest.java
@@ -18,17 +18,23 @@
 import org.hibernate.reactive.pool.impl.OracleParameters;
 import org.hibernate.reactive.pool.impl.PostgresParameters;
 import org.hibernate.reactive.pool.impl.SQLServerParameters;
+import org.hibernate.reactive.testing.DatabaseSelectionRule;
 
+import org.junit.Rule;
 import org.junit.Test;
 
 import io.vertx.ext.unit.TestContext;
 
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.dbType;
 
 public class BatchQueryOnConnectionTest extends BaseReactiveTest {
 
 	private static final int BATCH_SIZE = 20;
 
+	@Rule
+	public DatabaseSelectionRule selectionRule = DatabaseSelectionRule.skipTestsFor( H2 );
+
 	@Override
 	protected Set<Class<?>> annotatedEntities() {
 		return Set.of( DataPoint.class );
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BatchingConnectionTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BatchingConnectionTest.java
index 6c4fe6705..3f370ce7c 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BatchingConnectionTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/BatchingConnectionTest.java
@@ -13,17 +13,23 @@
 import org.hibernate.reactive.pool.impl.SqlClientConnection;
 import org.hibernate.reactive.stage.impl.StageSessionImpl;
 import org.hibernate.reactive.stage.impl.StageStatelessSessionImpl;
+import org.hibernate.reactive.testing.DatabaseSelectionRule;
 
+import org.junit.Rule;
 import org.junit.Test;
 
 import io.vertx.ext.unit.TestContext;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.util.impl.CompletionStages.loop;
 import static org.hibernate.reactive.util.impl.CompletionStages.voidFuture;
 
 public class BatchingConnectionTest extends ReactiveSessionTest {
 
+	@Rule
+	public DatabaseSelectionRule selectionRule = DatabaseSelectionRule.skipTestsFor( H2 );
+
 	@Override
 	protected Configuration constructConfiguration() {
 		Configuration configuration = super.constructConfiguration();
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/DefaultPortTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/DefaultPortTest.java
index 13d54b4d6..293a7f2b6 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/DefaultPortTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/DefaultPortTest.java
@@ -14,13 +14,16 @@
 import org.hibernate.reactive.containers.DatabaseConfiguration;
 import org.hibernate.reactive.pool.impl.DefaultSqlClientPoolConfiguration;
 import org.hibernate.reactive.provider.Settings;
+import org.hibernate.reactive.testing.DatabaseSelectionRule;
 
 import org.junit.Assert;
+import org.junit.Rule;
 import org.junit.Test;
 
 import io.vertx.sqlclient.SqlConnectOptions;
 import org.assertj.core.api.Assertions;
 
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.dbType;
 
 /**
@@ -28,6 +31,9 @@
  */
 public class DefaultPortTest {
 
+	@Rule
+	public DatabaseSelectionRule dbRule = DatabaseSelectionRule.skipTestsFor( H2 );
+
 	@Test
 	public void testDefaultPortIsSet() throws URISyntaxException {
 		DefaultSqlClientPoolConfiguration configuration = new DefaultSqlClientPoolConfiguration();
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/FormulaTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/FormulaTest.java
index 699164b46..2e866cc3f 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/FormulaTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/FormulaTest.java
@@ -22,13 +22,14 @@
 import java.util.Collection;
 import java.util.List;
 
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.MARIA;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.MYSQL;
 
 public class FormulaTest extends BaseReactiveTest {
 
 	@Rule
-	public DatabaseSelectionRule rule = DatabaseSelectionRule.skipTestsFor( MARIA, MYSQL );
+	public DatabaseSelectionRule rule = DatabaseSelectionRule.skipTestsFor( MARIA, MYSQL, H2 );
 
 	@Override
 	protected Collection<Class<?>> annotatedEntities() {
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/MutinyExceptionsTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/MutinyExceptionsTest.java
index 3790dcd2a..d02b96455 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/MutinyExceptionsTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/MutinyExceptionsTest.java
@@ -15,12 +15,16 @@
 import org.hibernate.HibernateException;
 import org.hibernate.cfg.AvailableSettings;
 import org.hibernate.cfg.Configuration;
+import org.hibernate.reactive.containers.DatabaseConfiguration;
+import org.hibernate.reactive.exception.ConstraintViolationException;
 import org.hibernate.reactive.mutiny.Mutiny;
 
 import org.junit.Test;
 
 import io.vertx.ext.unit.TestContext;
 
+import static org.hibernate.reactive.containers.DatabaseConfiguration.dbType;
+
 public class MutinyExceptionsTest extends BaseReactiveTest {
 
 	@Override
@@ -48,7 +52,12 @@ public void testDuplicateKeyException(TestContext context) {
 				.onItem().call( Mutiny.Session::flush )
 				.onItem().invoke( ignore -> context.fail( "Expected exception not thrown" ) )
 				.onFailure().recoverWithItem( err -> {
-					context.assertEquals( getExpectedException(), err.getClass() );
+					if( dbType() == DatabaseConfiguration.DBType.H2 ) {
+						context.assertTrue( ConstraintViolationException.class == err.getClass() ||
+								getExpectedException() == err.getClass() );
+					} else {
+						context.assertEquals( getExpectedException(), err.getClass() );
+					}
 					return null;
 				} )
 		);
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/UUIDAsBinaryType.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/UUIDAsBinaryType.java
index 77b6b50cc..b94a6818a 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/UUIDAsBinaryType.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/UUIDAsBinaryType.java
@@ -22,6 +22,7 @@
 import io.vertx.ext.unit.TestContext;
 
 import static java.util.Arrays.asList;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.MARIA;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.MYSQL;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.ORACLE;
@@ -105,7 +106,7 @@ public String toString() {
 	public static class ForOtherDbsTest extends UUIDAsBinaryType {
 
 		@Rule // Select a UUID field doesn't work with Oracle
-		public DatabaseSelectionRule rule = skipTestsFor( MYSQL, MARIA, ORACLE );
+		public DatabaseSelectionRule rule = skipTestsFor( MYSQL, MARIA, ORACLE, H2 );
 
 		@Override
 		protected Collection<Class<?>> annotatedEntities() {
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/UriConfigTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/UriConfigTest.java
index 7a0c96a0a..1996fe469 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/UriConfigTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/UriConfigTest.java
@@ -17,15 +17,21 @@
 import org.hibernate.dialect.SQLServer2012Dialect;
 import org.hibernate.reactive.containers.DatabaseConfiguration;
 import org.hibernate.reactive.provider.Settings;
+import org.hibernate.reactive.testing.DatabaseSelectionRule;
 
+import org.junit.Rule;
 import org.junit.Test;
 
 import io.vertx.ext.unit.TestContext;
 
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.dbType;
 
 public class UriConfigTest extends BaseReactiveTest {
 
+	@Rule
+	public DatabaseSelectionRule dbRule = DatabaseSelectionRule.skipTestsFor( H2 );
+
 	@Override
 	protected Configuration constructConfiguration() {
 		Class<? extends Dialect> dialect;
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/WrongCredentialsTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/WrongCredentialsTest.java
index 2cddf24d7..bc8d53d59 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/WrongCredentialsTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/WrongCredentialsTest.java
@@ -11,12 +11,15 @@
 import org.hibernate.cfg.Configuration;
 import org.hibernate.reactive.containers.DatabaseConfiguration;
 import org.hibernate.reactive.provider.Settings;
+import org.hibernate.reactive.testing.DatabaseSelectionRule;
 
+import org.junit.Rule;
 import org.junit.Test;
 
 import io.vertx.ext.unit.TestContext;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 
 /**
  * Check that the right exception is thrown when there is an error with the credentials.
@@ -28,6 +31,9 @@
  */
 public class WrongCredentialsTest extends BaseReactiveTest {
 
+	@Rule
+	public DatabaseSelectionRule dbRule = DatabaseSelectionRule.skipTestsFor( H2 );
+
 	@Override
 	protected Configuration constructConfiguration() {
 		Configuration configuration = super.constructConfiguration();
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/configuration/JdbcUrlParserTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/configuration/JdbcUrlParserTest.java
index 51b679062..99e972dac 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/configuration/JdbcUrlParserTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/configuration/JdbcUrlParserTest.java
@@ -12,13 +12,16 @@
 import org.hibernate.HibernateError;
 import org.hibernate.reactive.pool.impl.DefaultSqlClientPool;
 import org.hibernate.reactive.pool.impl.DefaultSqlClientPoolConfiguration;
+import org.hibernate.reactive.testing.DatabaseSelectionRule;
 
+import org.junit.Rule;
 import org.junit.Test;
 
 import io.vertx.sqlclient.SqlConnectOptions;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.fail;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.createJdbcUrl;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.dbType;
 import static org.junit.Assert.assertThrows;
@@ -33,6 +36,9 @@ public class JdbcUrlParserTest {
 
 	private static final String DEFAULT_DB = "hreactDB";
 
+	@Rule
+	public DatabaseSelectionRule rule = DatabaseSelectionRule.skipTestsFor( H2 );
+
 	@Test
 	public void exceptionWhenNull() {
 		final HibernateError error = assertThrows( HibernateError.class, () -> {
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/containers/DatabaseConfiguration.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/containers/DatabaseConfiguration.java
index 3bd7f11b2..7584ebf38 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/containers/DatabaseConfiguration.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/containers/DatabaseConfiguration.java
@@ -25,7 +25,8 @@ public enum DBType {
 		POSTGRESQL( PostgreSQLDatabase.INSTANCE, 5432, "POSTGRES", "PG" ),
 		COCKROACHDB( CockroachDBDatabase.INSTANCE, 26257, "COCKROACH" ),
 		SQLSERVER( MSSQLServerDatabase.INSTANCE, 1433, "MSSQL", "MSSQLSERVER" ),
-		ORACLE( OracleDatabase.INSTANCE, 1521 );
+		ORACLE( OracleDatabase.INSTANCE, 1521 ),
+		H2( H2Database.INSTANCE, -1 );
 
 		private final TestableDatabase configuration;
 		private final int defaultPort;
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/schema/SchemaUpdateTestBase.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/schema/SchemaUpdateTestBase.java
index 692e63d26..b0dac7d0e 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/schema/SchemaUpdateTestBase.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/schema/SchemaUpdateTestBase.java
@@ -21,6 +21,7 @@
 import io.vertx.ext.unit.TestContext;
 
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.DB2;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.SQLSERVER;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.dbType;
 import static org.hibernate.tool.schema.JdbcMetadaAccessStrategy.GROUPED;
@@ -53,7 +54,7 @@ protected Configuration constructConfiguration(String hbm2DdlOption) {
 	}
 
 	@Rule
-	public DatabaseSelectionRule dbRule = DatabaseSelectionRule.skipTestsFor( DB2 );
+	public DatabaseSelectionRule dbRule = DatabaseSelectionRule.skipTestsFor( DB2, H2 );
 
 	protected Configuration constructConfiguration(String action) {
 		Configuration configuration = super.constructConfiguration();
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/schema/SchemaValidationTestBase.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/schema/SchemaValidationTestBase.java
index 8b67e2b35..9afdaf537 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/schema/SchemaValidationTestBase.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/schema/SchemaValidationTestBase.java
@@ -12,6 +12,7 @@
 import javax.persistence.Table;
 
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.DB2;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.tool.schema.JdbcMetadaAccessStrategy.GROUPED;
 import static org.hibernate.tool.schema.JdbcMetadaAccessStrategy.INDIVIDUALLY;
 
@@ -59,7 +60,7 @@ protected Configuration constructConfiguration(String hbm2DdlOption) {
 	}
 
 	@Rule
-	public DatabaseSelectionRule dbRule = DatabaseSelectionRule.skipTestsFor( DB2 );
+	public DatabaseSelectionRule dbRule = DatabaseSelectionRule.skipTestsFor( DB2, H2 );
 
 	protected Configuration constructConfiguration(String action) {
 		Configuration configuration = super.constructConfiguration();
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/JsonTypeTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/JsonTypeTest.java
index be7446d90..83a9b08ce 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/JsonTypeTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/JsonTypeTest.java
@@ -25,6 +25,7 @@
 import io.vertx.ext.unit.TestContext;
 
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.DB2;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.ORACLE;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.SQLSERVER;
 
@@ -34,7 +35,7 @@
 public class JsonTypeTest extends BaseReactiveTest {
 
 	@Rule
-	public DatabaseSelectionRule selectionRule = DatabaseSelectionRule.skipTestsFor( DB2, SQLSERVER, ORACLE);
+	public DatabaseSelectionRule selectionRule = DatabaseSelectionRule.skipTestsFor( DB2, SQLSERVER, ORACLE, H2);
 
 	@Override
 	protected Collection<Class<?>> annotatedEntities() {
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/StringToJsonTypeTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/StringToJsonTypeTest.java
index 992e7f656..916e5d190 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/StringToJsonTypeTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/StringToJsonTypeTest.java
@@ -25,6 +25,7 @@
 import java.util.function.Consumer;
 
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.DB2;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.MARIA;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.ORACLE;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.SQLSERVER;
@@ -35,7 +36,7 @@
 public class StringToJsonTypeTest extends BaseReactiveTest {
 
 	@Rule
-	public DatabaseSelectionRule selectionRule = DatabaseSelectionRule.skipTestsFor( DB2, SQLSERVER, MARIA, ORACLE );
+	public DatabaseSelectionRule selectionRule = DatabaseSelectionRule.skipTestsFor( DB2, SQLSERVER, MARIA, ORACLE, H2 );
 
 	@Override
 	protected Collection<Class<?>> annotatedEntities() {
diff --git a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/UserJsonTypeTest.java b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/UserJsonTypeTest.java
index fa8e1165e..907a2d942 100644
--- a/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/UserJsonTypeTest.java
+++ b/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/UserJsonTypeTest.java
@@ -27,6 +27,7 @@
 import io.vertx.ext.unit.TestContext;
 
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.DB2;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.H2;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.ORACLE;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.SQLSERVER;
 
@@ -36,7 +37,7 @@
 public class UserJsonTypeTest extends BaseReactiveTest {
 
 	@Rule
-	public DatabaseSelectionRule selectionRule = DatabaseSelectionRule.skipTestsFor( DB2, SQLSERVER, ORACLE );
+	public DatabaseSelectionRule selectionRule = DatabaseSelectionRule.skipTestsFor( DB2, SQLSERVER, ORACLE, H2 );
 
 	@Override
 	protected Collection<Class<?>> annotatedEntities() {