diff --git a/core/src/test/java/net/corda/core/flows/SerializationApiInJavaTest.java b/core/src/test/java/net/corda/core/flows/SerializationApiInJavaTest.java
new file mode 100644
index 0000000000..07bec4bb79
--- /dev/null
+++ b/core/src/test/java/net/corda/core/flows/SerializationApiInJavaTest.java
@@ -0,0 +1,37 @@
+package net.corda.core.flows;
+
+import net.corda.core.serialization.SerializationDefaults;
+import net.corda.core.serialization.SerializationFactory;
+import net.corda.testing.SerializationEnvironmentRule;
+import org.junit.Rule;
+import org.junit.Test;
+
+import static net.corda.core.serialization.SerializationAPIKt.serialize;
+import static org.junit.Assert.assertNull;
+
+/**
+ * Enforce parts of the serialization API that aren't obvious from looking at the {@link net.corda.core.serialization.SerializationAPIKt} code.
+ */
+public class SerializationApiInJavaTest {
+    @Rule
+    public final SerializationEnvironmentRule testSerialization = new SerializationEnvironmentRule();
+
+    @Test
+    public void enforceSerializationFactoryApi() {
+        assertNull(SerializationFactory.Companion.getCurrentFactory());
+        SerializationFactory factory = SerializationFactory.Companion.getDefaultFactory();
+        assertNull(factory.getCurrentContext());
+        serialize("hello", factory, factory.getDefaultContext());
+    }
+
+    @Test
+    public void enforceSerializationDefaultsApi() {
+        SerializationDefaults defaults = SerializationDefaults.INSTANCE;
+        SerializationFactory factory = defaults.getSERIALIZATION_FACTORY();
+        serialize("hello", factory, defaults.getP2P_CONTEXT());
+        serialize("hello", factory, defaults.getRPC_SERVER_CONTEXT());
+        serialize("hello", factory, defaults.getRPC_CLIENT_CONTEXT());
+        serialize("hello", factory, defaults.getSTORAGE_CONTEXT());
+        serialize("hello", factory, defaults.getCHECKPOINT_CONTEXT());
+    }
+}
diff --git a/node-api/src/test/java/net/corda/nodeapi/internal/serialization/ForbiddenLambdaSerializationTests.java b/node-api/src/test/java/net/corda/nodeapi/internal/serialization/ForbiddenLambdaSerializationTests.java
index ba452d138c..0cb878ff49 100644
--- a/node-api/src/test/java/net/corda/nodeapi/internal/serialization/ForbiddenLambdaSerializationTests.java
+++ b/node-api/src/test/java/net/corda/nodeapi/internal/serialization/ForbiddenLambdaSerializationTests.java
@@ -20,7 +20,7 @@ import static org.assertj.core.api.ThrowableAssert.catchThrowable;
 
 public final class ForbiddenLambdaSerializationTests {
     @Rule
-    public SerializationEnvironmentRule testSerialization = new SerializationEnvironmentRule();
+    public final SerializationEnvironmentRule testSerialization = new SerializationEnvironmentRule();
     private SerializationFactory factory;
 
     @Before
diff --git a/node-api/src/test/java/net/corda/nodeapi/internal/serialization/LambdaCheckpointSerializationTest.java b/node-api/src/test/java/net/corda/nodeapi/internal/serialization/LambdaCheckpointSerializationTest.java
index 93156d1073..62a71ff630 100644
--- a/node-api/src/test/java/net/corda/nodeapi/internal/serialization/LambdaCheckpointSerializationTest.java
+++ b/node-api/src/test/java/net/corda/nodeapi/internal/serialization/LambdaCheckpointSerializationTest.java
@@ -19,7 +19,7 @@ import static org.assertj.core.api.ThrowableAssert.catchThrowable;
 
 public final class LambdaCheckpointSerializationTest {
     @Rule
-    public SerializationEnvironmentRule testSerialization = new SerializationEnvironmentRule();
+    public final SerializationEnvironmentRule testSerialization = new SerializationEnvironmentRule();
     private SerializationFactory factory;
     private SerializationContext context;
 
diff --git a/node/src/test/java/net/corda/node/services/vault/VaultQueryJavaTests.java b/node/src/test/java/net/corda/node/services/vault/VaultQueryJavaTests.java
index a7ff598d38..8f817167bf 100644
--- a/node/src/test/java/net/corda/node/services/vault/VaultQueryJavaTests.java
+++ b/node/src/test/java/net/corda/node/services/vault/VaultQueryJavaTests.java
@@ -35,7 +35,7 @@ import static org.assertj.core.api.Assertions.*;
 
 public class VaultQueryJavaTests {
     @Rule
-    public SerializationEnvironmentRule testSerialization = new SerializationEnvironmentRule();
+    public final SerializationEnvironmentRule testSerialization = new SerializationEnvironmentRule();
     private MockServices services;
     private MockServices issuerServices;
     private VaultService vaultService;