diff --git a/components/script/script_thread.rs b/components/script/script_thread.rs
index 3062f57e8b5..8ef650ecee9 100644
--- a/components/script/script_thread.rs
+++ b/components/script/script_thread.rs
@@ -119,7 +119,7 @@ use task_source::file_reading::FileReadingTaskSource;
 use task_source::history_traversal::HistoryTraversalTaskSource;
 use task_source::networking::NetworkingTaskSource;
 use task_source::performance_timeline::PerformanceTimelineTaskSource;
-use task_source::user_interaction::{UserInteractionTask, UserInteractionTaskSource};
+use task_source::user_interaction::UserInteractionTaskSource;
 use time::{get_time, precise_time_ns, Tm};
 use url::Position;
 use webdriver_handlers;
@@ -276,8 +276,6 @@ pub enum MainThreadScriptMsg {
     /// dispatched to ScriptThread). Allows for a replace bool to be passed. If true,
     /// the current entry will be replaced instead of a new entry being added.
     Navigate(PipelineId, LoadData, bool),
-    /// Tasks that originate from the user interaction task source
-    UserInteraction(UserInteractionTask),
     /// Notifies the script thread that a new worklet has been loaded, and thus the page should be
     /// reflowed.
     WorkletLoaded(PipelineId),
@@ -1296,8 +1294,6 @@ impl ScriptThread {
                 self.collect_reports(reports_chan),
             MainThreadScriptMsg::WorkletLoaded(pipeline_id) =>
                 self.handle_worklet_loaded(pipeline_id),
-            MainThreadScriptMsg::UserInteraction(task) =>
-                task.handle_task(self),
         }
     }
 
diff --git a/components/script/task_source/user_interaction.rs b/components/script/task_source/user_interaction.rs
index 1969ee0a41a..753c090df9e 100644
--- a/components/script/task_source/user_interaction.rs
+++ b/components/script/task_source/user_interaction.rs
@@ -7,7 +7,8 @@ use dom::bindings::refcounted::Trusted;
 use dom::event::{EventBubbles, EventCancelable, EventRunnable};
 use dom::eventtarget::EventTarget;
 use dom::window::Window;
-use script_thread::{MainThreadScriptMsg, Runnable, RunnableWrapper, ScriptThread};
+use script_runtime::{CommonScriptMsg, ScriptThreadEventCategory};
+use script_thread::{MainThreadScriptMsg, Runnable, RunnableWrapper};
 use servo_atoms::Atom;
 use std::fmt;
 use std::result::Result;
@@ -29,8 +30,11 @@ impl TaskSource for UserInteractionTaskSource {
                              wrapper: &RunnableWrapper)
                              -> Result<(), ()>
                              where T: Runnable + Send + 'static {
-        let msg = UserInteractionTask(wrapper.wrap_runnable(msg));
-        self.0.send(MainThreadScriptMsg::UserInteraction(msg)).map_err(|_| ())
+        let msg = MainThreadScriptMsg::Common(CommonScriptMsg::RunnableMsg(
+            ScriptThreadEventCategory::InputEvent,
+            wrapper.wrap_runnable(msg),
+        ));
+        self.0.send(msg).map_err(|_| ())
     }
 }
 
@@ -51,17 +55,3 @@ impl UserInteractionTaskSource {
         let _ = self.queue(runnable, window.upcast());
     }
 }
-
-pub struct UserInteractionTask(pub Box<Runnable + Send>);
-
-impl fmt::Debug for UserInteractionTask {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "UserInteractionTask(...)")
-    }
-}
-
-impl UserInteractionTask {
-    pub fn handle_task(self, script_thread: &ScriptThread) {
-        self.0.main_thread_handler(script_thread);
-    }
-}