diff --git a/src/runtime/app.ts b/src/runtime/app.ts
index f3adde96..736f221d 100644
--- a/src/runtime/app.ts
+++ b/src/runtime/app.ts
@@ -6,6 +6,7 @@ import { Scheduler } from "./scheduler";
 import { validateProps } from "./template_helpers";
 import { TemplateSet, TemplateSetConfig } from "./template_set";
 import { validateTarget } from "./utils";
+import { handleError } from "./error_handling";
 
 // reimplement dev mode stuff see last change in 0f7a8289a6fb8387c3c1af41c6664b2a8448758f
 
@@ -94,9 +95,7 @@ export class App<
         nodeErrorHandlers.set(node, handlers);
       }
       handlers.unshift((e) => {
-        if (isResolved) {
-          console.error(e);
-        } else {
+        if (!isResolved) {
           reject(e);
         }
         throw e;
@@ -169,6 +168,10 @@ export class App<
       return node;
     };
   }
+
+  handleError(...args: Parameters<typeof handleError>) {
+    return handleError(...args);
+  }
 }
 
 export async function mount<
diff --git a/src/runtime/component_node.ts b/src/runtime/component_node.ts
index ef07901e..e6636001 100644
--- a/src/runtime/component_node.ts
+++ b/src/runtime/component_node.ts
@@ -1,7 +1,7 @@
 import type { App, Env } from "./app";
 import { BDom, VNode } from "./blockdom";
 import { Component, ComponentConstructor, Props } from "./component";
-import { fibersInError, handleError, OwlError } from "./error_handling";
+import { fibersInError, OwlError } from "./error_handling";
 import { Fiber, makeChildFiber, makeRootFiber, MountFiber, MountOptions } from "./fibers";
 import {
   clearReactivesForCallback,
@@ -141,7 +141,7 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
     try {
       await Promise.all(this.willStart.map((f) => f.call(component)));
     } catch (e) {
-      handleError({ node: this, error: e });
+      this.app.handleError({ node: this, error: e });
       return;
     }
     if (this.status === STATUS.NEW && this.fiber === fiber) {
@@ -219,7 +219,7 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
           cb.call(component);
         }
       } catch (e) {
-        handleError({ error: e, node: this });
+        this.app.handleError({ error: e, node: this });
       }
     }
     this.status = STATUS.DESTROYED;
diff --git a/src/runtime/error_handling.ts b/src/runtime/error_handling.ts
index f8c734f7..4b4134d6 100644
--- a/src/runtime/error_handling.ts
+++ b/src/runtime/error_handling.ts
@@ -71,5 +71,6 @@ export function handleError(params: ErrorParams) {
     } catch (e) {
       console.error(e);
     }
+    throw error;
   }
 }
diff --git a/src/runtime/fibers.ts b/src/runtime/fibers.ts
index 0aeb7e6d..9b33373f 100644
--- a/src/runtime/fibers.ts
+++ b/src/runtime/fibers.ts
@@ -1,6 +1,6 @@
 import { BDom, mount } from "./blockdom";
 import type { ComponentNode } from "./component_node";
-import { fibersInError, handleError, OwlError } from "./error_handling";
+import { fibersInError, OwlError } from "./error_handling";
 import { STATUS } from "./status";
 
 export function makeChildFiber(node: ComponentNode, parent: Fiber): Fiber {
@@ -130,7 +130,7 @@ export class Fiber {
         (this.bdom as any) = true;
         this.bdom = node.renderFn();
       } catch (e) {
-        handleError({ node, error: e });
+        node.app.handleError({ node, error: e });
       }
       root.setCounter(root.counter - 1);
     }
@@ -195,7 +195,7 @@ export class RootFiber extends Fiber {
       }
     } catch (e) {
       this.locked = false;
-      handleError({ fiber: current || this, error: e });
+      node.app.handleError({ fiber: current || this, error: e });
     }
   }
 
@@ -259,7 +259,7 @@ export class MountFiber extends RootFiber {
         }
       }
     } catch (e) {
-      handleError({ fiber: current as Fiber, error: e });
+      this.node.app.handleError({ fiber: current as Fiber, error: e });
     }
   }
 }
diff --git a/tests/components/basics.test.ts b/tests/components/basics.test.ts
index c54f0159..3dfe537c 100644
--- a/tests/components/basics.test.ts
+++ b/tests/components/basics.test.ts
@@ -1,5 +1,12 @@
 import { App, Component, mount, status, toRaw, useState, xml } from "../../src";
-import { elem, makeTestFixture, nextTick, snapshotEverything, useLogLifecycle } from "../helpers";
+import {
+  elem,
+  makeTestFixture,
+  nextAppError,
+  nextTick,
+  snapshotEverything,
+  useLogLifecycle,
+} from "../helpers";
 import { markup } from "../../src/runtime/utils";
 
 let fixture: HTMLElement;
@@ -208,14 +215,14 @@ describe("basics", () => {
       static template = xml`<div/>`;
     }
     let error: Error;
-    const prom = mount(Test, fixture);
+    const app = new App(Test);
+    const prom = app.mount(fixture);
     await Promise.resolve();
     fixture.remove();
-    try {
-      await prom;
-    } catch (e) {
-      error = e as Error;
-    }
+    prom.catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow(
+      "Cannot mount a component on a detached dom node"
+    );
     expect(error!).toBeDefined();
     expect(error!.message).toBe("Cannot mount a component on a detached dom node");
     expect(console.warn).toBeCalledTimes(1);
diff --git a/tests/components/error_handling.test.ts b/tests/components/error_handling.test.ts
index 023cdb50..8a7e0d07 100644
--- a/tests/components/error_handling.test.ts
+++ b/tests/components/error_handling.test.ts
@@ -1,4 +1,4 @@
-import { Component, mount, onWillDestroy } from "../../src";
+import { App, Component, mount, onWillDestroy } from "../../src";
 import {
   onError,
   onMounted,
@@ -18,6 +18,7 @@ import {
   nextMicroTick,
   snapshotEverything,
   useLogLifecycle,
+  nextAppError,
 } from "../helpers";
 import { OwlError } from "../../src/runtime/error_handling";
 
@@ -59,9 +60,10 @@ describe("basics", () => {
     parent.state.flag = true;
 
     parent.render();
-    await nextTick();
+    await expect(nextAppError(parent.__owl__.app)).resolves.toThrow(
+      "An error occured in the owl lifecycle"
+    );
     expect(fixture.innerHTML).toBe("");
-    expect(mockConsoleError).toBeCalledTimes(1);
     expect(mockConsoleWarn).toBeCalledTimes(1);
   });
 
@@ -71,12 +73,13 @@ describe("basics", () => {
       static template = xml`<SomeMispelledComponent />`;
       static components = { SomeComponent };
     }
+    const app = new App(Parent);
     let error: Error;
-    try {
-      await mount(Parent, fixture);
-    } catch (e) {
-      error = e as Error;
-    }
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow(
+      'Cannot find the definition of component "SomeMispelledComponent"'
+    );
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe('Cannot find the definition of component "SomeMispelledComponent"');
     expect(console.error).toBeCalledTimes(0);
@@ -90,12 +93,13 @@ describe("basics", () => {
       static template = xml`<SomeMispelledComponent />`;
       static components = { SomeComponent };
     }
+    const app = new App(Parent, { test: true });
     let error: Error;
-    try {
-      await mount(Parent, fixture, { test: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow(
+      'Cannot find the definition of component "SomeMispelledComponent"'
+    );
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe('Cannot find the definition of component "SomeMispelledComponent"');
     expect(console.error).toBeCalledTimes(0);
@@ -109,13 +113,13 @@ describe("basics", () => {
       static template = xml`<SomeComponent />`;
       static components = { SomeComponent: notAComponentConstructor };
     }
+    const app = new App(Parent as typeof Component);
     let error: Error;
-    try {
-      // @ts-expect-error
-      await mount(Parent, fixture);
-    } catch (e) {
-      error = e as Error;
-    }
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow(
+      '"SomeComponent" is not a Component. It must inherit from the Component class'
+    );
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       '"SomeComponent" is not a Component. It must inherit from the Component class'
@@ -156,16 +160,15 @@ describe("basics", () => {
 describe("errors and promises", () => {
   test("a rendering error will reject the mount promise", async () => {
     // we do not catch error in willPatch anymore
-    class App extends Component {
+    class Root extends Component {
       static template = xml`<div><t t-esc="this.will.crash"/></div>`;
     }
 
+    const app = new App(Root);
     let error: OwlError;
-    try {
-      await mount(App, fixture);
-    } catch (e) {
-      error = e as OwlError;
-    }
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.cause).toBeDefined();
     const regexp =
@@ -176,7 +179,7 @@ describe("errors and promises", () => {
   });
 
   test("an error in mounted call will reject the mount promise", async () => {
-    class App extends Component {
+    class Root extends Component {
       static template = xml`<div>abc</div>`;
       setup() {
         onMounted(() => {
@@ -185,12 +188,11 @@ describe("errors and promises", () => {
       }
     }
 
+    const app = new App(Root);
     let error: OwlError;
-    try {
-      await mount(App, fixture);
-    } catch (e) {
-      error = e as OwlError;
-    }
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.cause).toBeDefined();
     expect(error!.cause.message).toBe("boom");
@@ -200,7 +202,7 @@ describe("errors and promises", () => {
   });
 
   test("an error in onMounted callback will have the component's setup in its stack trace", async () => {
-    class App extends Component {
+    class Root extends Component {
       static template = xml`<div>abc</div>`;
       setup() {
         onMounted(() => {
@@ -209,14 +211,13 @@ describe("errors and promises", () => {
       }
     }
 
-    let error: Error;
-    try {
-      await mount(App, fixture, { test: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    const app = new App(Root, { test: true });
+    let error: OwlError;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occurred in onMounted");
+    await mountProm;
     expect(error!).toBeDefined();
-    expect(error!.stack).toContain("App.setup");
+    expect(error!.stack).toContain("Root.setup");
     expect(error!.stack).toContain("error_handling.test.ts");
     expect(fixture.innerHTML).toBe("");
     expect(mockConsoleError).toBeCalledTimes(0);
@@ -224,7 +225,7 @@ describe("errors and promises", () => {
   });
 
   test("errors in onWillRender/onRender aren't wrapped more than once", async () => {
-    class App extends Component {
+    class Root extends Component {
       static template = xml`<div>abc</div>`;
       setup() {
         onWillRender(() => {
@@ -236,12 +237,11 @@ describe("errors and promises", () => {
       }
     }
 
-    let error: Error;
-    try {
-      await mount(App, fixture, { test: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    const app = new App(Root, { test: true });
+    let error: OwlError;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occurred in onWillRender");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       `The following error occurred in onWillRender: "boom in onWillRender"`
@@ -278,12 +278,11 @@ describe("errors and promises", () => {
       }
     }
 
-    let error: any;
-    try {
-      await mount(Root, fixture, { test: true });
-    } catch (e) {
-      error = e;
-    }
+    const app = new App(Root, { test: true });
+    let error: OwlError;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occurred in onWillStart");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       `The following error occurred in onWillStart: "boom in onWillStart"`
@@ -342,17 +341,16 @@ describe("errors and promises", () => {
     class Child extends Component {
       static template = xml`<div><t t-esc="this.will.crash"/></div>`;
     }
-    class App extends Component {
+    class Parent extends Component {
       static template = xml`<div><Child/></div>`;
       static components = { Child };
     }
 
+    const app = new App(Parent);
     let error: OwlError;
-    try {
-      await mount(App, fixture);
-    } catch (e) {
-      error = e as OwlError;
-    }
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.cause).toBeDefined();
     const regexp =
@@ -394,12 +392,11 @@ describe("errors and promises", () => {
       static components = { Child };
     }
 
+    const app = new App(Parent);
     let error: OwlError;
-    try {
-      await mount(Parent, fixture);
-    } catch (e) {
-      error = e as OwlError;
-    }
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.cause).toBeDefined();
     const regexp =
@@ -425,13 +422,12 @@ describe("errors and promises", () => {
       }
     }
 
-    try {
-      await mount(Example, fixture, { test: true });
-    } catch (e) {
-      expect((e as Error).message).toBe(
-        `The following error occurred in onMounted: "Error in mounted"`
-      );
-    }
+    const app = new App(Example, { test: true });
+    let error: OwlError;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occurred in onMounted");
+    await mountProm;
+    expect(error!.message).toBe(`The following error occurred in onMounted: "Error in mounted"`);
     // 1 additional error is logged because the destruction of the app causes
     // the onWillUnmount hook to be called and to fail
     expect(mockConsoleError).toBeCalledTimes(1);
@@ -448,9 +444,10 @@ describe("errors and promises", () => {
 
     root.state = "boom";
     root.render();
-    await nextTick();
+    await expect(nextAppError(root.__owl__.app)).resolves.toThrow(
+      "error occured in the owl lifecycle"
+    );
     expect(fixture.innerHTML).toBe("");
-    expect(mockConsoleError).toBeCalledTimes(1);
     expect(mockConsoleWarn).toBeCalledTimes(1);
   });
 });
@@ -500,13 +497,12 @@ describe("can catch errors", () => {
         });
       }
     }
-    let e: Error;
-    try {
-      await mount(Root, fixture, { test: true });
-    } catch (error) {
-      e = error as Error;
-    }
-    expect(e!.message).toBe(
+    const app = new App(Root, { test: true });
+    let error: OwlError;
+    const crashProm = expect(nextAppError(app)).resolves.toThrow("error occurred in onWillStart");
+    await app.mount(fixture).catch((e: Error) => (error = e));
+    await crashProm;
+    expect(error!.message).toBe(
       `The following error occurred in onWillStart: "No active component (a hook function should only be called in 'setup')"`
     );
   });
@@ -523,14 +519,13 @@ describe("can catch errors", () => {
         });
       }
     }
-    let e: OwlError;
-    try {
-      await mount(Root, fixture, { test: true });
-    } catch (error) {
-      e = error as OwlError;
-    }
-    expect(e!.message).toBe(`The following error occurred in onMounted: "test error"`);
-    expect(e!.cause).toBe(err);
+    const app = new App(Root, { test: true });
+    let error: OwlError;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occurred in onMounted");
+    await mountProm;
+    expect(error!.message).toBe(`The following error occurred in onMounted: "test error"`);
+    expect(error!.cause).toBe(err);
   });
 
   test("Errors in owl lifecycle are wrapped in dev mode: async hook", async () => {
@@ -546,14 +541,13 @@ describe("can catch errors", () => {
         });
       }
     }
-    let e: OwlError;
-    try {
-      await mount(Root, fixture, { test: true });
-    } catch (error) {
-      e = error as OwlError;
-    }
-    expect(e!.message).toBe(`The following error occurred in onWillStart: "test error"`);
-    expect(e!.cause).toBe(err);
+    const app = new App(Root, { test: true });
+    let error: OwlError;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occurred in onWillStart");
+    await mountProm;
+    expect(error!.message).toBe(`The following error occurred in onWillStart: "test error"`);
+    expect(error!.cause).toBe(err);
   });
 
   test("Errors in owl lifecycle are wrapped outside dev mode: sync hook", async () => {
@@ -568,16 +562,15 @@ describe("can catch errors", () => {
         });
       }
     }
-    let e: OwlError;
-    try {
-      await mount(Root, fixture);
-    } catch (error) {
-      e = error as OwlError;
-    }
-    expect(e!.message).toBe(
+    const app = new App(Root);
+    let error: OwlError;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+    await mountProm;
+    expect(error!.message).toBe(
       `An error occured in the owl lifecycle (see this Error's "cause" property)`
     );
-    expect(e!.cause).toBe(err);
+    expect(error!.cause).toBe(err);
   });
 
   test("Errors in owl lifecycle are wrapped out of dev mode: async hook", async () => {
@@ -593,16 +586,15 @@ describe("can catch errors", () => {
         });
       }
     }
-    let e: OwlError;
-    try {
-      await mount(Root, fixture);
-    } catch (error) {
-      e = error as OwlError;
-    }
-    expect(e!.message).toBe(
+    const app = new App(Root);
+    let error: OwlError;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+    await mountProm;
+    expect(error!.message).toBe(
       `An error occured in the owl lifecycle (see this Error's "cause" property)`
     );
-    expect(e!.cause).toBe(err);
+    expect(error!.cause).toBe(err);
   });
 
   test("Thrown values that are not errors are wrapped in dev mode", async () => {
@@ -616,16 +608,15 @@ describe("can catch errors", () => {
         });
       }
     }
-    let e: OwlError;
-    try {
-      await mount(Root, fixture, { test: true });
-    } catch (error) {
-      e = error as OwlError;
-    }
-    expect(e!.message).toBe(
+    const app = new App(Root, { test: true });
+    let error: OwlError;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("not an Error was thrown in onMounted");
+    await mountProm;
+    expect(error!.message).toBe(
       `Something that is not an Error was thrown in onMounted (see this Error's "cause" property)`
     );
-    expect(e!.cause).toBe("This is not an error");
+    expect(error!.cause).toBe("This is not an error");
   });
 
   test("Thrown values that are not errors are wrapped outside dev mode", async () => {
@@ -639,16 +630,15 @@ describe("can catch errors", () => {
         });
       }
     }
-    let e: OwlError;
-    try {
-      await mount(Root, fixture);
-    } catch (error) {
-      e = error as OwlError;
-    }
-    expect(e!.message).toBe(
+    const app = new App(Root);
+    let error: OwlError;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+    await mountProm;
+    expect(error!.message).toBe(
       `An error occured in the owl lifecycle (see this Error's "cause" property)`
     );
-    expect(e!.cause).toBe("This is not an error");
+    expect(error!.cause).toBe("This is not an error");
   });
 
   test("can catch an error in the initial call of a component render function (parent mounted)", async () => {
diff --git a/tests/components/hooks.test.ts b/tests/components/hooks.test.ts
index a5da81b9..7b72e265 100644
--- a/tests/components/hooks.test.ts
+++ b/tests/components/hooks.test.ts
@@ -17,8 +17,16 @@ import {
   useChildSubEnv,
   useSubEnv,
   xml,
+  OwlError,
 } from "../../src/index";
-import { elem, logStep, makeTestFixture, nextTick, snapshotEverything } from "../helpers";
+import {
+  elem,
+  logStep,
+  makeTestFixture,
+  nextAppError,
+  nextTick,
+  snapshotEverything,
+} from "../helpers";
 
 let fixture: HTMLElement;
 
@@ -650,11 +658,12 @@ describe("hooks", () => {
         }
       }
 
-      try {
-        await mount(MyComponent, fixture);
-      } catch (e: any) {
-        expect(e.cause.message).toBe("Intentional error");
-      }
+      let error: OwlError;
+      const app = new App(MyComponent);
+      const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+      await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+      await mountProm;
+      expect(error!.cause.message).toBe("Intentional error");
       // no console.error because the error has been caught in this test
       expect(console.error).toHaveBeenCalledTimes(0);
       console.error = originalconsoleError;
diff --git a/tests/components/props_validation.test.ts b/tests/components/props_validation.test.ts
index e118f408..12f6a894 100644
--- a/tests/components/props_validation.test.ts
+++ b/tests/components/props_validation.test.ts
@@ -1,6 +1,6 @@
-import { makeTestFixture, nextTick, snapshotEverything } from "../helpers";
-import { Component, onError, xml, mount } from "../../src";
-import { DEV_MSG } from "../../src/runtime/app";
+import { makeTestFixture, nextAppError, nextTick, snapshotEverything } from "../helpers";
+import { Component, onError, xml, mount, OwlError } from "../../src";
+import { App, DEV_MSG } from "../../src/runtime/app";
 import { validateProps } from "../../src/runtime/template_helpers";
 import { Schema } from "../../src/runtime/validation";
 
@@ -48,13 +48,14 @@ describe("props validation", () => {
       static components = { SubComp };
       static template = xml`<div><SubComp /></div>`;
     }
-    let error: Error | undefined;
 
-    try {
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    const app = new App(Parent, { test: true });
+    let error: OwlError | undefined;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow(
+      "Invalid props for component 'SubComp': 'message' is missing"
+    );
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe("Invalid props for component 'SubComp': 'message' is missing");
     error = undefined;
@@ -77,12 +78,13 @@ describe("props validation", () => {
       static template = xml`<div><SubComp /></div>`;
     }
 
-    let error: Error;
-    try {
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    const app = new App(Parent, { test: true });
+    let error: OwlError | undefined;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow(
+      "Invalid props for component 'SubComp': 'message' is missing"
+    );
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe("Invalid props for component 'SubComp': 'message' is missing");
   });
@@ -126,14 +128,12 @@ describe("props validation", () => {
       };
       (Parent as any).components = { SubComp };
 
-      let error: Error | undefined;
       props = {};
-
-      try {
-        await mount(Parent, fixture, { dev: true });
-      } catch (e) {
-        error = e as Error;
-      }
+      let app = new App(Parent, { test: true });
+      let error: OwlError | undefined;
+      let mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+      await expect(nextAppError(app)).resolves.toThrow("Invalid props for component '_a'");
+      await mountProm;
       expect(error!).toBeDefined();
       expect(error!.message).toBe(
         `Invalid props for component '_a': 'p' is undefined (should be a ${test.type.name.toLowerCase()})`
@@ -147,11 +147,10 @@ describe("props validation", () => {
       }
       expect(error!).toBeUndefined();
       props = { p: test.ko };
-      try {
-        await mount(Parent, fixture, { dev: true });
-      } catch (e) {
-        error = e as Error;
-      }
+      app = new App(Parent, { test: true });
+      mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+      await expect(nextAppError(app)).resolves.toThrow("Invalid props for component '_a'");
+      await mountProm;
       expect(error!).toBeDefined();
       expect(error!.message).toBe(
         `Invalid props for component '_a': 'p' is not a ${test.type.name.toLowerCase()}`
@@ -181,13 +180,12 @@ describe("props validation", () => {
         static template = xml`<div>hey</div>`;
       };
       (Parent as any).components = { SubComp };
-      let error: Error | undefined;
       props = {};
-      try {
-        await mount(Parent, fixture, { dev: true });
-      } catch (e) {
-        error = e as Error;
-      }
+      let app = new App(Parent, { test: true });
+      let error: OwlError | undefined;
+      let mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+      await expect(nextAppError(app)).resolves.toThrow("Invalid props for component '_a'");
+      await mountProm;
       expect(error!).toBeDefined();
       expect(error!.message).toBe(
         `Invalid props for component '_a': 'p' is undefined (should be a ${test.type.name.toLowerCase()})`
@@ -201,11 +199,10 @@ describe("props validation", () => {
       }
       expect(error!).toBeUndefined();
       props = { p: test.ko };
-      try {
-        await mount(Parent, fixture, { dev: true });
-      } catch (e) {
-        error = e as Error;
-      }
+      app = new App(Parent, { test: true });
+      mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+      await expect(nextAppError(app)).resolves.toThrow("Invalid props for component '_a'");
+      await mountProm;
       expect(error!).toBeDefined();
       expect(error!.message).toBe(
         `Invalid props for component '_a': 'p' is not a ${test.type.name.toLowerCase()}`
@@ -227,26 +224,25 @@ describe("props validation", () => {
     }
     let error: Error;
     let props: { p?: any };
+    props = { p: "string" };
     try {
-      props = { p: "string" };
       await mount(Parent, fixture, { dev: true });
     } catch (e) {
       error = e as Error;
     }
     expect(error!).toBeUndefined();
+    props = { p: true };
     try {
-      props = { p: true };
       await mount(Parent, fixture, { dev: true });
     } catch (e) {
       error = e as Error;
     }
     expect(error!).toBeUndefined();
-    try {
-      props = { p: 1 };
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    props = { p: 1 };
+    const app = new App(Parent, { test: true });
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'SubComp'");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       "Invalid props for component 'SubComp': 'p' is not a string or boolean"
@@ -267,26 +263,25 @@ describe("props validation", () => {
     }
     let error: Error;
     let props: { p?: any };
+    props = { p: "key" };
     try {
-      props = { p: "key" };
       await mount(Parent, fixture, { dev: true });
     } catch (e) {
       error = e as Error;
     }
     expect(error!).toBeUndefined();
+    props = {};
     try {
-      props = {};
       await mount(Parent, fixture, { dev: true });
     } catch (e) {
       error = e as Error;
     }
     expect(error!).toBeUndefined();
-    try {
-      props = { p: 1 };
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    props = { p: 1 };
+    const app = new App(Parent, { test: true });
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'SubComp'");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe("Invalid props for component 'SubComp': 'p' is not a string");
   });
@@ -319,20 +314,18 @@ describe("props validation", () => {
       error = e as Error;
     }
     expect(error!).toBeUndefined();
-    try {
-      props = { p: [1] };
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    props = { p: [1] };
+    let app = new App(Parent, { test: true });
+    let mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'SubComp'");
+    await mountProm;
     expect(error!).toBeDefined();
     error = undefined;
-    try {
-      props = { p: ["string", 1] };
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    app = new App(Parent, { test: true });
+    mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'SubComp'");
+    await mountProm;
+    expect(error!).toBeDefined();
   });
 
   test("can validate an array with multiple sub element types", async () => {
@@ -370,12 +363,11 @@ describe("props validation", () => {
       error = e as Error;
     }
     expect(error!).toBeUndefined();
-    try {
-      props = { p: [true, 1] };
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    props = { p: [true, 1] };
+    const app = new App(Parent, { test: true });
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'SubComp'");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       "Invalid props for component 'SubComp': 'p[1]' is not a string or boolean"
@@ -405,33 +397,30 @@ describe("props validation", () => {
       error = e as Error;
     }
     expect(error!).toBeUndefined();
-    try {
-      props = { p: { id: 1, url: "url", extra: true } };
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    props = { p: { id: 1, url: "url", extra: true } };
+    let app = new App(Parent, { test: true });
+    let mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'SubComp'");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       "Invalid props for component 'SubComp': 'p' has not the correct shape (unknown key 'extra')"
     );
-    try {
-      props = { p: { id: "1", url: "url" } };
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    props = { p: { id: "1", url: "url" } };
+    app = new App(Parent, { test: true });
+    mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'SubComp'");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       "Invalid props for component 'SubComp': 'p' has not the correct shape ('id' is not a number)"
     );
     error = undefined;
-    try {
-      props = { p: { id: 1 } };
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    props = { p: { id: 1 } };
+    app = new App(Parent, { test: true });
+    mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'SubComp'");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       "Invalid props for component 'SubComp': 'p' has not the correct shape ('url' is missing (should be a string))"
@@ -474,12 +463,11 @@ describe("props validation", () => {
       error = e as Error;
     }
     expect(error!).toBeUndefined();
-    try {
-      props = { p: { id: 1, url: [12, true] } };
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    props = { p: { id: 1, url: [12, true] } };
+    const app = new App(Parent, { test: true });
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'SubComp'");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       "Invalid props for component 'SubComp': 'p' has not the correct shape ('url' is not a boolean or list of numbers)"
@@ -686,11 +674,10 @@ describe("props validation", () => {
       static components = { SubComp };
     }
     let error: Error;
-    try {
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    const app = new App(Parent, { test: true });
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'SubComp'");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe("Invalid props for component 'SubComp': 'p' is missing");
   });
@@ -754,11 +741,10 @@ describe("props validation", () => {
       static template = xml`<div><Child/></div>`;
     }
     let error: Error;
-    try {
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    const app = new App(Parent, { test: true });
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("Invalid props for component 'Child'");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       "Invalid props for component 'Child': 'mandatory' is missing (should be a number)"
@@ -859,11 +845,12 @@ describe("default props", () => {
       static template = xml`<Child/>`;
     }
     let error: Error;
-    try {
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    const app = new App(Parent, { test: true });
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow(
+      "default value cannot be defined for a mandatory prop"
+    );
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(
       "A default value cannot be defined for a mandatory prop (name: 'mandatory', component: Child)"
diff --git a/tests/components/refs.test.ts b/tests/components/refs.test.ts
index f5cb3e1f..a68b0b87 100644
--- a/tests/components/refs.test.ts
+++ b/tests/components/refs.test.ts
@@ -1,5 +1,5 @@
-import { Component, mount, onMounted, useRef, useState } from "../../src/index";
-import { logStep, makeTestFixture, nextTick, snapshotEverything } from "../helpers";
+import { App, Component, mount, onMounted, useRef, useState } from "../../src/index";
+import { logStep, makeTestFixture, nextAppError, nextTick, snapshotEverything } from "../helpers";
 import { xml } from "../../src/index";
 
 snapshotEverything();
@@ -94,9 +94,14 @@ describe("refs", () => {
       ref = useRef("coucou");
     }
 
-    await expect(async () => {
-      await mount(Test, fixture);
-    }).rejects.toThrowError("Cannot have 2 elements with same ref name at the same time");
+    const app = new App(Test, { test: true });
+    const mountProm = expect(app.mount(fixture)).rejects.toThrowError(
+      "Cannot have 2 elements with same ref name at the same time"
+    );
+    await expect(nextAppError(app)).resolves.toThrow(
+      "Cannot have 2 elements with same ref name at the same time"
+    );
+    await mountProm;
     expect(console.warn).toBeCalledTimes(1);
     console.warn = consoleWarn;
   });
diff --git a/tests/components/slots.test.ts b/tests/components/slots.test.ts
index be1e574d..9373bf2d 100644
--- a/tests/components/slots.test.ts
+++ b/tests/components/slots.test.ts
@@ -1,5 +1,5 @@
 import { App, Component, mount, onMounted, useState, xml } from "../../src/index";
-import { children, makeTestFixture, nextTick, snapshotEverything } from "../helpers";
+import { children, makeTestFixture, nextAppError, nextTick, snapshotEverything } from "../helpers";
 
 snapshotEverything();
 let originalconsoleWarn = console.warn;
@@ -204,13 +204,12 @@ describe("slots", () => {
       static components = { Child };
     }
 
-    let error = null;
-    try {
-      await mount(Parent, fixture);
-    } catch (e) {
-      error = e;
-    }
-    expect(error).not.toBeNull();
+    let error: Error;
+    const app = new App(Parent);
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+    await mountProm;
+    expect(error!).not.toBeNull();
     expect(mockConsoleWarn).toBeCalledTimes(1);
   });
 
diff --git a/tests/components/style_class.test.ts b/tests/components/style_class.test.ts
index 4b4d9bc9..d2d0db5f 100644
--- a/tests/components/style_class.test.ts
+++ b/tests/components/style_class.test.ts
@@ -1,6 +1,6 @@
 import { OwlError } from "../../src/runtime/error_handling";
-import { Component, mount, onMounted, useState, xml } from "../../src";
-import { makeTestFixture, nextTick, snapshotEverything } from "../helpers";
+import { App, Component, mount, onMounted, useState, xml } from "../../src";
+import { makeTestFixture, nextAppError, nextTick, snapshotEverything } from "../helpers";
 
 snapshotEverything();
 let fixture: HTMLElement;
@@ -343,16 +343,15 @@ describe("style and class handling", () => {
     class Child extends Component {
       static template = xml`<div t-att-class="props.class" t-esc="this.will.crash"/>`;
     }
-    class ParentWidget extends Component {
+    class Parent extends Component {
       static template = xml`<Child class="'a'"/>`;
       static components = { Child };
     }
     let error: OwlError;
-    try {
-      await mount(ParentWidget, fixture);
-    } catch (e) {
-      error = e as OwlError;
-    }
+    const app = new App(Parent);
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.cause).toBeDefined();
     const regexp =
diff --git a/tests/components/t_foreach.test.ts b/tests/components/t_foreach.test.ts
index 155472db..197a516b 100644
--- a/tests/components/t_foreach.test.ts
+++ b/tests/components/t_foreach.test.ts
@@ -1,5 +1,11 @@
-import { Component, mount, onMounted, useState, xml } from "../../src/index";
-import { makeTestFixture, nextTick, snapshotEverything, useLogLifecycle } from "../helpers";
+import { App, Component, mount, onMounted, useState, xml } from "../../src/index";
+import {
+  makeTestFixture,
+  nextAppError,
+  nextTick,
+  snapshotEverything,
+  useLogLifecycle,
+} from "../helpers";
 
 snapshotEverything();
 
@@ -315,9 +321,13 @@ describe("list of components", () => {
       `;
       static components = { Child };
     }
-    await expect(async () => {
-      await mount(Parent, fixture, { dev: true });
-    }).rejects.toThrowError("Got duplicate key in t-foreach: child");
+
+    const app = new App(Parent, { test: true });
+    const mountProm = expect(app.mount(fixture)).rejects.toThrow(
+      "Got duplicate key in t-foreach: child"
+    );
+    await expect(nextAppError(app)).resolves.toThrow("Got duplicate key in t-foreach: child");
+    await mountProm;
     console.info = consoleInfo;
     expect(mockConsoleWarn).toBeCalledTimes(1);
   });
diff --git a/tests/helpers.ts b/tests/helpers.ts
index 714653a7..abdd1ca8 100644
--- a/tests/helpers.ts
+++ b/tests/helpers.ts
@@ -261,6 +261,20 @@ expect.extend({
   },
 });
 
+export function nextAppError(app: any) {
+  const { handleError } = app;
+  return new Promise((resolve) => {
+    app.handleError = (...args: Parameters<typeof handleError>) => {
+      try {
+        handleError.call(app, ...args);
+      } catch (e: any) {
+        app.handleError = handleError;
+        resolve(e);
+      }
+    };
+  });
+}
+
 declare global {
   namespace jest {
     interface Matchers<R> {
diff --git a/tests/misc/portal.test.ts b/tests/misc/portal.test.ts
index ff2dcf3e..103aa669 100644
--- a/tests/misc/portal.test.ts
+++ b/tests/misc/portal.test.ts
@@ -12,7 +12,7 @@ import {
 } from "../../src";
 import { xml } from "../../src/";
 import { DEV_MSG } from "../../src/runtime/app";
-import { elem, makeTestFixture, nextTick, snapshotEverything } from "../helpers";
+import { elem, makeTestFixture, nextAppError, nextTick, snapshotEverything } from "../helpers";
 
 let fixture: HTMLElement;
 let originalconsoleWarn = console.warn;
@@ -269,11 +269,10 @@ describe("Portal", () => {
     }
 
     let error: Error;
-    try {
-      await mount(Parent, fixture);
-    } catch (e) {
-      error = e as Error;
-    }
+    const app = new App(Parent);
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("invalid portal target");
+    await mountProm;
 
     expect(error!).toBeDefined();
     expect(error!.message).toBe("invalid portal target");
@@ -960,11 +959,10 @@ describe("Portal: Props validation", () => {
         </div>`;
     }
     let error: OwlError;
-    try {
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as OwlError;
-    }
+    const app = new App(Parent);
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("error occured in the owl lifecycle");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.cause).toBeDefined();
     expect(error!.cause.message).toBe(`' ' is not a valid selector`);
@@ -980,11 +978,10 @@ describe("Portal: Props validation", () => {
         </div>`;
     }
     let error: Error;
-    try {
-      await mount(Parent, fixture, { dev: true });
-    } catch (e) {
-      error = e as Error;
-    }
+    const app = new App(Parent);
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow("invalid portal target");
+    await mountProm;
     expect(error!).toBeDefined();
     expect(error!.message).toBe(`invalid portal target`);
   });