diff --git a/google-cloud-bigquery/src/test/java/com/google/cloud/bigquery/FieldValueTest.java b/google-cloud-bigquery/src/test/java/com/google/cloud/bigquery/FieldValueTest.java
index 381b62fe6..6dbe81707 100644
--- a/google-cloud-bigquery/src/test/java/com/google/cloud/bigquery/FieldValueTest.java
+++ b/google-cloud-bigquery/src/test/java/com/google/cloud/bigquery/FieldValueTest.java
@@ -120,6 +120,7 @@ public void testFromPb() {
     assertEquals(FieldValue.fromPb(TIMESTAMP_FIELD), value.getRepeatedValue().get(1));
     value = FieldValue.fromPb(NULL_FIELD);
     assertTrue(value.isNull());
+    assertEquals(null, value.getStringValueOrDefault(null));
     assertEquals("defaultValue", value.getStringValueOrDefault("defaultValue"));
   }