diff --git a/metafacture-json/build.gradle b/metafacture-json/build.gradle
index 14f574988..01a5b23a7 100644
--- a/metafacture-json/build.gradle
+++ b/metafacture-json/build.gradle
@@ -25,5 +25,6 @@ dependencies {
   implementation 'com.github.erosb:everit-json-schema:1.14.1'
   testImplementation 'junit:junit:4.12'
   testImplementation 'org.mockito:mockito-core:2.5.5'
+  testImplementation 'com.github.tomakehurst:wiremock-jre8:2.33.2'
   testRuntimeOnly 'org.slf4j:slf4j-simple:1.7.21'
 }
diff --git a/metafacture-json/src/test/java/org/metafacture/json/JsonValidatorTest.java b/metafacture-json/src/test/java/org/metafacture/json/JsonValidatorTest.java
index aae7dffaf..df5f37dba 100644
--- a/metafacture-json/src/test/java/org/metafacture/json/JsonValidatorTest.java
+++ b/metafacture-json/src/test/java/org/metafacture/json/JsonValidatorTest.java
@@ -15,8 +15,21 @@
  */
 package org.metafacture.json;
 
+import static org.hamcrest.CoreMatchers.both;
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.junit.Assert.assertThat;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.stream.Collectors;
+
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 import org.metafacture.framework.MetafactureException;
 import org.metafacture.framework.ObjectReceiver;
@@ -25,6 +38,11 @@
 import org.mockito.Mockito;
 import org.mockito.MockitoAnnotations;
 
+import com.github.tomakehurst.wiremock.client.WireMock;
+import com.github.tomakehurst.wiremock.core.WireMockConfiguration;
+import com.github.tomakehurst.wiremock.junit.WireMockRule;
+
+
 /**
  * Tests for {@link JsonValidator}.
  *
@@ -46,15 +64,32 @@ public final class JsonValidatorTest {
     private ObjectReceiver<String> receiver;
     private InOrder inOrder;
 
+    @Rule
+    public WireMockRule wireMockRule = new WireMockRule(WireMockConfiguration.wireMockConfig()
+            .jettyAcceptors(Runtime.getRuntime().availableProcessors()).dynamicPort());
+
     @Before
-    public void setup() {
+    public void setup() throws IOException {
         MockitoAnnotations.initMocks(this);
+        WireMock.stubFor(WireMock.request("GET", WireMock.urlEqualTo("/schema"))
+                .willReturn(WireMock.ok().withBody(readToString(getClass().getResource(SCHEMA)))));
         validator = new JsonValidator(SCHEMA);
         validator.setSchemaRoot("/schemas/");
         validator.setReceiver(receiver);
         inOrder = Mockito.inOrder(receiver);
     }
 
+    private String readToString(final URL url) throws IOException {
+        return new BufferedReader(new InputStreamReader(url.openStream(), StandardCharsets.UTF_8))
+                .lines().collect(Collectors.joining("\n"));
+    }
+
+    @Test
+    public void callWireMockSchema() throws MalformedURLException, IOException {
+        final String schemaContent = readToString(new URL(wireMockRule.baseUrl() + "/schema"));
+        assertThat(schemaContent, both(containsString("$schema")).and(containsString("$ref")));
+    }
+
     @Test
     public void testShouldValidate() {
         validator.process(JSON_VALID);