diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 48ec6ba4..b1f26a49 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,7 +27,7 @@ jobs:
       - name: Test
         run: |-
           export TERM=${TERM:-dumb}
-          ./gradlew test
+          ./gradlew test --debug
       # test build
       - name: Build with Gradle
         run: ./gradlew build
diff --git a/src/test/java/com/gocardless/GoCardlessClientTest.java b/src/test/java/com/gocardless/GoCardlessClientTest.java
index 5f5bc806..23a59fac 100644
--- a/src/test/java/com/gocardless/GoCardlessClientTest.java
+++ b/src/test/java/com/gocardless/GoCardlessClientTest.java
@@ -108,7 +108,7 @@ public void shouldCreateACustomer() throws Exception {
         http.enqueueResponse(201, "fixtures/client/create_a_customer_response.json");
         Customer customer = client.customers().create().withHeader("Accept-Language", "fr-FR")
                 .withFamilyName("Osborne").withGivenName("Sharon").withAddressLine1("27 Acer Road")
-                .withAddressLine2("Apt 2").withCity("London").withPostalCode("E8 3GX")
+                .withAddressLine2("Apt 2").withCity("London").withPostalCode("E8 3GX").withEmail("test-email@gmail.com")
                 .withCountryCode("GB").execute();
         assertThat(customer.getId()).isNotNull();
         assertThat(customer.getFamilyName()).isEqualTo("Osborne");
@@ -122,7 +122,7 @@ public void shouldCreateACustomer() throws Exception {
     public void shouldCreateACustomerWithAGeneratedIdempotencyKey() throws Exception {
         http.enqueueResponse(201, "fixtures/client/create_a_customer_response.json");
         CustomerCreateRequest request = client.customers().create()
-                .withHeader("Accept-Language", "fr-FR").withFamilyName("Osborne")
+                .withHeader("Accept-Language", "fr-FR").withFamilyName("Osborne").withEmail("test-email@gmail.com")
                 .withGivenName("Sharon").withAddressLine1("27 Acer Road").withAddressLine2("Apt 2")
                 .withCity("London").withPostalCode("E8 3GX").withCountryCode("GB");
         request.execute();
@@ -139,7 +139,7 @@ public void shouldHandleConflictWhenCreatingACustomer() throws Exception {
         http.enqueueResponse(409, "fixtures/conflict.json");
         http.enqueueResponse(200, "fixtures/client/create_a_customer_response.json");
         CustomerCreateRequest request = client.customers().create()
-                .withHeader("Accept-Language", "fr-FR").withFamilyName("Osborne")
+                .withHeader("Accept-Language", "fr-FR").withFamilyName("Osborne").withEmail("test-email@gmail.com")
                 .withGivenName("Sharon").withAddressLine1("27 Acer Road").withAddressLine2("Apt 2")
                 .withCity("London").withPostalCode("E8 3GX").withCountryCode("GB");
         request.execute();
diff --git a/src/test/resources/fixtures/client/create_a_customer_request.json b/src/test/resources/fixtures/client/create_a_customer_request.json
index 94c339bb..178be6c5 100644
--- a/src/test/resources/fixtures/client/create_a_customer_request.json
+++ b/src/test/resources/fixtures/client/create_a_customer_request.json
@@ -4,6 +4,7 @@
         "address_line2": "Apt 2",
         "city": "London",
         "country_code": "GB",
+        "email": "test-email@gmail.com",
         "family_name": "Osborne",
         "given_name": "Sharon",
         "postal_code": "E8 3GX"