diff --git a/src/loop.zig b/src/loop.zig
index 7e48fe0..1934043 100644
--- a/src/loop.zig
+++ b/src/loop.zig
@@ -114,6 +114,11 @@ pub const SingleThreaded = struct {
     ) void {
         defer ctx.loop.freeCbk(completion, ctx);
 
+        const old_events_nb = ctx.loop.removeEvent();
+        if (builtin.is_test) {
+            report("timeout done, remaining events: {d}", .{old_events_nb - 1});
+        }
+
         // TODO: return the error to the callback
         result catch |err| {
             switch (err) {
@@ -123,11 +128,6 @@ pub const SingleThreaded = struct {
             return;
         };
 
-        const old_events_nb = ctx.loop.removeEvent();
-        if (builtin.is_test) {
-            report("timeout done, remaining events: {d}", .{old_events_nb - 1});
-        }
-
         // js callback
         if (ctx.js_cbk) |js_cbk| {
             defer js_cbk.deinit(ctx.loop.alloc);
@@ -166,17 +166,20 @@ pub const SingleThreaded = struct {
     ) void {
         defer ctx.loop.freeCbk(completion, ctx);
 
+        const old_events_nb = ctx.loop.removeEvent();
+        if (builtin.is_test) {
+            report("cancel done, remaining events: {d}", .{old_events_nb - 1});
+        }
+
         // TODO: return the error to the callback
         result catch |err| {
-            log.err("cancel callback: {any}", .{err});
+            switch (err) {
+                error.NotFound => log.debug("cancel callback: {any}", .{err}),
+                else => log.err("cancel callback: {any}", .{err}),
+            }
             return;
         };
 
-        const old_events_nb = ctx.loop.removeEvent();
-        if (builtin.is_test) {
-            report("timeout done, remaining events: {d}", .{old_events_nb - 1});
-        }
-
         // js callback
         if (ctx.js_cbk) |js_cbk| {
             defer js_cbk.deinit(ctx.loop.alloc);
@@ -197,7 +200,11 @@ pub const SingleThreaded = struct {
             .js_cbk = js_cbk,
         };
 
+        const old_events_nb = self.addEvent();
         self.io.cancel(*ContextCancel, ctx, cancelCallback, completion, comp_cancel);
+        if (builtin.is_test) {
+            report("cancel {d}", .{old_events_nb + 1});
+        }
     }
 
     // Yield