Fix dependencies on oak-exercise

diff --git a/oak-exercise/pom.xml b/oak-exercise/pom.xml
index 3c4dfbc9fe..e3469dff6d 100644
--- a/oak-exercise/pom.xml
+++ b/oak-exercise/pom.xml
@@ -41,7 +41,7 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <skip>true</skip>
+          <skip>false</skip>
         </configuration>
       </plugin>
       <plugin>
@@ -182,6 +182,13 @@
       <version>${jackrabbit.version}</version>
       <optional>true</optional>
     </dependency>
+    <dependency>
+      <groupId>org.apache.jackrabbit</groupId>
+      <artifactId>oak-commons</artifactId>
+      <version>${project.version}</version>
+      <type>test-jar</type>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.apache.jackrabbit</groupId>
       <artifactId>oak-core</artifactId>
@@ -208,12 +215,28 @@
       <version>${project.version}</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.jackrabbit</groupId>
+      <artifactId>oak-store-document</artifactId>
+      <version>${project.version}</version>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.apache.jackrabbit</groupId>
       <artifactId>oak-store-composite</artifactId>
       <version>${project.version}</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>io.dropwizard.metrics</groupId>
+      <artifactId>metrics-core</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-classic</artifactId>