diff --git a/acme4j-letsencrypt/pom.xml b/acme4j-letsencrypt/pom.xml
index 68388396..06798524 100644
--- a/acme4j-letsencrypt/pom.xml
+++ b/acme4j-letsencrypt/pom.xml
@@ -28,21 +28,6 @@
     <name>acme4j Let's Encrypt</name>
     <description>Let's Encrypt service provider for acme4j</description>
 
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.19</version>
-                <configuration>
-                    <parallel>classes</parallel>
-                    <threadCount>10</threadCount>
-                    <excludedGroups>org.shredzone.acme4j.provider.LetsEncryptAcmeClientProviderTest$RequiresNetwork</excludedGroups>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
-
     <dependencies>
         <dependency>
             <groupId>org.shredzone.acme4j</groupId>
diff --git a/acme4j-letsencrypt/src/test/java/org/shredzone/acme4j/provider/LetsEncryptAcmeClientProviderTest.java b/acme4j-letsencrypt/src/test/java/org/shredzone/acme4j/provider/LetsEncryptAcmeClientProviderTest.java
index 0279ea14..12be8d51 100644
--- a/acme4j-letsencrypt/src/test/java/org/shredzone/acme4j/provider/LetsEncryptAcmeClientProviderTest.java
+++ b/acme4j-letsencrypt/src/test/java/org/shredzone/acme4j/provider/LetsEncryptAcmeClientProviderTest.java
@@ -36,8 +36,6 @@ import org.shredzone.acme4j.AcmeClient;
  */
 public class LetsEncryptAcmeClientProviderTest {
 
-    public interface RequiresNetwork {}
-
     private static final String V01_DIRECTORY_URI = "https://acme-v01.api.letsencrypt.org/directory";
     private static final String STAGING_DIRECTORY_URI = "https://acme-staging.api.letsencrypt.org/directory";
 
@@ -111,9 +109,12 @@ public class LetsEncryptAcmeClientProviderTest {
     /**
      * Test if the {@link LetsEncryptAcmeClientProvider#openConnection(URI)} accepts only
      * the Let's Encrypt certificate.
+     * <p>
+     * This test requires a network connection. It should be excluded from automated
+     * builds.
      */
     @Test
-    @Category(RequiresNetwork.class)
+    @Category(HttpURLConnection.class)
     public void testCertificate() throws IOException, URISyntaxException {
         LetsEncryptAcmeClientProvider provider = new LetsEncryptAcmeClientProvider();
 
diff --git a/pom.xml b/pom.xml
index cfb89b16..9a8ce906 100644
--- a/pom.xml
+++ b/pom.xml
@@ -75,6 +75,16 @@
                     <target>1.7</target>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.19</version>
+                <configuration>
+                    <parallel>classes</parallel>
+                    <threadCount>10</threadCount>
+                    <excludedGroups>java.net.HttpURLConnection</excludedGroups>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>