diff --git a/container/src/main/java/org/implab/gradle/containers/tasks/RunImage.java b/container/src/main/java/org/implab/gradle/containers/tasks/RunImage.java
--- a/container/src/main/java/org/implab/gradle/containers/tasks/RunImage.java
+++ b/container/src/main/java/org/implab/gradle/containers/tasks/RunImage.java
@@ -6,6 +6,7 @@ import org.gradle.api.provider.ListPrope
 import org.gradle.api.provider.Property;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.Optional;
+import org.gradle.api.tasks.TaskAction;
 import org.implab.gradle.containers.dsl.OptionsMixin;
 import org.implab.gradle.containers.dsl.VolumeSpec;
 
@@ -32,6 +33,7 @@ public abstract class RunImage extends D
         getCommandLine().addAll(args);
     }
 
+    @TaskAction
     public void run() throws InterruptedException, IOException {
         docker().runImage(
                 getImageName().get(),