diff --git a/bramble-api/src/test/java/org/briarproject/bramble/test/TestUtils.java b/bramble-api/src/test/java/org/briarproject/bramble/test/TestUtils.java
index e2ae3cb91..832109779 100644
--- a/bramble-api/src/test/java/org/briarproject/bramble/test/TestUtils.java
+++ b/bramble-api/src/test/java/org/briarproject/bramble/test/TestUtils.java
@@ -40,6 +40,7 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -50,6 +51,7 @@ import java.util.Random;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import javax.annotation.Nullable;
+import javax.crypto.Cipher;
 
 import static java.util.Arrays.asList;
 import static org.briarproject.bramble.api.crypto.CryptoConstants.MAX_AGREEMENT_PUBLIC_KEY_BYTES;
@@ -335,4 +337,13 @@ public class TestUtils {
 		}
 		return false;
 	}
+
+	public static boolean isCryptoStrengthUnlimited() {
+		try {
+			return Cipher.getMaxAllowedKeyLength("AES/CBC/PKCS5Padding")
+					== Integer.MAX_VALUE;
+		} catch (NoSuchAlgorithmException e) {
+			throw new AssertionError();
+		}
+	}
 }
diff --git a/bramble-core/src/test/java/org/briarproject/bramble/db/BasicHyperSqlTest.java b/bramble-core/src/test/java/org/briarproject/bramble/db/BasicHyperSqlTest.java
index fae313cf3..4c4d0af02 100644
--- a/bramble-core/src/test/java/org/briarproject/bramble/db/BasicHyperSqlTest.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/db/BasicHyperSqlTest.java
@@ -3,6 +3,7 @@ package org.briarproject.bramble.db;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.test.TestUtils;
 import org.briarproject.bramble.util.StringUtils;
+import org.junit.Before;
 
 import java.io.File;
 import java.sql.Connection;
@@ -10,10 +11,18 @@ import java.sql.DriverManager;
 import java.sql.SQLException;
 import java.sql.Statement;
 
+import static org.briarproject.bramble.test.TestUtils.isCryptoStrengthUnlimited;
+import static org.junit.Assume.assumeTrue;
+
 public class BasicHyperSqlTest extends BasicDatabaseTest {
 
 	private final SecretKey key = TestUtils.getSecretKey();
 
+	@Before
+	public void setUp() {
+		assumeTrue(isCryptoStrengthUnlimited());
+	}
+
 	@Override
 	protected String getBinaryType() {
 		return "BINARY(32)";
diff --git a/bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlDatabaseTest.java b/bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlDatabaseTest.java
index bf785e31e..90fe79bc9 100644
--- a/bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlDatabaseTest.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlDatabaseTest.java
@@ -3,9 +3,18 @@ package org.briarproject.bramble.db;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
+import org.junit.Before;
+
+import static org.briarproject.bramble.test.TestUtils.isCryptoStrengthUnlimited;
+import static org.junit.Assume.assumeTrue;
 
 public class HyperSqlDatabaseTest extends JdbcDatabaseTest {
 
+	@Before
+	public void setUp() {
+		assumeTrue(isCryptoStrengthUnlimited());
+	}
+
 	@Override
 	protected JdbcDatabase createDatabase(DatabaseConfig config,
 			MessageFactory messageFactory, Clock clock) {
diff --git a/bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlMigrationTest.java b/bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlMigrationTest.java
index f4468728f..66ffeea02 100644
--- a/bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlMigrationTest.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlMigrationTest.java
@@ -1,13 +1,22 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.junit.Before;
 
 import java.sql.Connection;
 import java.util.List;
 
+import static org.briarproject.bramble.test.TestUtils.isCryptoStrengthUnlimited;
+import static org.junit.Assume.assumeTrue;
+
 @NotNullByDefault
 public class HyperSqlMigrationTest extends DatabaseMigrationTest {
 
+	@Before
+	public void setUp() {
+		assumeTrue(isCryptoStrengthUnlimited());
+	}
+
 	@Override
 	Database<Connection> createDatabase(
 			List<Migration<Connection>> migrations) {