call TestApp.ResetBootstrap as finalizer of the test OnTerminate hook

core/base.go

@@ -1279,7 +1279,7 @@ func (app *BaseApp) initLogger() error {
 		for {
 			select {
 			case <-done:
-				handler.WriteAll(ctx)
+				return
 			case <-ticker.C:
 				handler.WriteAll(ctx)
 			}
@@ -1289,8 +1289,13 @@ func (app *BaseApp) initLogger() error {
 	app.logger = slog.New(handler)
 
 	app.OnTerminate().PreAdd(func(e *TerminateEvent) error {
+		// write all remaining logs before ticker.Stop to avoid races with ResetBootstrap user calls
+		handler.WriteAll(context.Background())
+
 		ticker.Stop()
+
 		done <- true
+
 		return nil
 	})
 

tests/app.go

@@ -40,10 +40,13 @@ type TestApp struct {
 //
 // After this call, the app instance shouldn't be used anymore.
 func (t *TestApp) Cleanup() {
-	t.ResetEventCalls()
-	t.ResetBootstrapState()
-	t.TestMailer.Reset()
-	t.OnTerminate().Trigger(&core.TerminateEvent{App: t})
+	t.OnTerminate().Trigger(&core.TerminateEvent{App: t}, func(e *core.TerminateEvent) error {
+		t.TestMailer.Reset()
+		t.ResetEventCalls()
+		t.ResetBootstrapState()
+
+		return nil
+	})
 
 	if t.DataDir() != "" {
 		os.RemoveAll(t.DataDir())