dependencyManagement not used for dependencies in plugin section.

In my parent, I have a dependencyManagement set with this jar:
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.stchome.build.maven</groupId>
<artifactId>testng-initializer</artifactId>
<version>1.0</version>
<scope>test</scope>
</dependency>

I have a plugin specified that had a dependency like this:
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<id>run-testng</id>
<phase>test</phase>
<configuration>
<tasks>
<java classname="com.stchome.testng.initializer.PackageInitializer">
<arg path="$

{project.build.testOutputDirectory}"/>
<arg path="${project.build.testSourceDirectory}"/>
</java>
<ant antfile="run-testng.xml" inheritRefs="true" inheritAll="true">
<property name="target.dir" value="${project.build.directory}"/>
<property name="test-classes.dir" value="${project.build.testOutputDirectory}

"/>
<property name="test-source.dir" value="$

{project.build.testSourceDirectory}

"/>
</ant>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>com.stchome.build.maven</groupId>
<artifactId>testng-initializer</artifactId>
</dependency>
</dependencies>
</plugin>

When I build, it doesn't seem to resolve this dependency version from dependencyManagement

[INFO] An invalid artifact was detected.

This artifact might be in your project's POM, or it might have been included transitively du
information we do have for this artifact:

o GroupID: com.stchome.build.maven
o ArtifactID: testng-initializer
o Version: <<< MISSING >>>
o Type: jar

[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.artifact.InvalidArtifactRTException: For artifact {com.stchome.build.maven:
n cannot be empty.
at org.apache.maven.artifact.DefaultArtifact.validateIdentity(DefaultArtifact.java:1
at org.apache.maven.artifact.DefaultArtifact.<init>(DefaultArtifact.java:119)
at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultAr
at org.apache.maven.artifact.factory.DefaultArtifactFactory.createDependencyArtifact
at org.apache.maven.project.artifact.MavenMetadataSource.createArtifacts(MavenMetada
at org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:
at org.apache.maven.plugin.DefaultPluginManager.verifyVersionedPlugin(DefaultPluginM
at org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.ja
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycle
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindPluginToLifecycle(Default
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(De
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleE
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLi
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecu
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:256)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
at java.lang.reflect.Method.invoke(Method.java:324)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)