- fixed section on surefire tests (#20)

README.md

@@ -41,26 +41,21 @@ Add the following to the downstream maven `pom.xml`. Activation occurs alongside
 #### Surefire Tests
 
 Mockito, Byte Buddy and others need to be explicitly added as a java agent for instrumentation. Use
-the `maven-dependency-plugin` to grab it's jar location and add it to the `argLine`.
+the `maven-dependency-plugin` to grab it's jar location and configure the `argLine` property.
 
 ```xml
 
+<properties>
+  <argLine>-javaagent:${org.mockito:mockito-core:jar} -javaagent:${net.bytebuddy:byte-buddy-agent:jar}</argLine>
+</properties>
+
 <build>
-  <plugins>
-    <plugin>
-      <groupId>org.apache.maven.plugins</groupId>
-      <artifactId>maven-dependency-plugin</artifactId>
-    </plugin>
-    <plugin>
-      <groupId>org.apache.maven.plugins</groupId>
-      <artifactId>maven-surefire-plugin</artifactId>
-      <configuration>
-        <argLine>@{argLine} -javaagent:${org.mockito:mockito-core:jar}
-          -javaagent:${net.bytebuddy:byte-buddy-agent:jar}
-        </argLine>
-      </configuration>
-    </plugin>
-  </plugins>
+<plugins>
+  <plugin>
+    <groupId>org.apache.maven.plugins</groupId>
+    <artifactId>maven-dependency-plugin</artifactId>
+  </plugin>
+</plugins>
 </build>
 ```