diff --git a/src/section_runner.rs b/src/section_runner.rs
index 94ea457..04bbd19 100644
--- a/src/section_runner.rs
+++ b/src/section_runner.rs
@@ -7,7 +7,7 @@ use std::{
         atomic::{AtomicI32, Ordering},
         Arc,
     },
-    time::Duration,
+    time::Duration, mem::swap,
 };
 use thiserror::Error;
 use tokio::{
@@ -38,6 +38,7 @@ enum RunnerMsg {
     Quit,
     QueueRun(RunHandle, SectionRef, Duration),
     CancelRun(RunHandle),
+    CancelAll,
 }
 
 #[derive(Debug)]
@@ -170,6 +171,14 @@ async fn runner_task(
                         trace!(handle = handle.0, "cancelling run by handle");
                         run.cancel(&*interface);
                     }
+                },
+                CancelAll => {
+                    let mut old_runs = LinkedList::new();
+                    swap(&mut old_runs, &mut run_queue);
+                    trace!(count = old_runs.len(), "cancelling all runs");
+                    for mut run in old_runs {
+                        run.cancel(&*interface);
+                    }
                 }
             }
         };
@@ -235,7 +244,8 @@ impl SectionRunner {
     }
 
     pub async fn cancel_all(&mut self) -> Result<()> {
-        todo!()
+        self.msg_send.send(RunnerMsg::CancelAll).await?;
+        Ok(())
     }
 
     pub async fn pause(&mut self) -> Result<()> {