diff --git a/tests/helpers/Participant.ts b/tests/helpers/Participant.ts
index 3cc6ce6f7aec..6ea306351048 100644
--- a/tests/helpers/Participant.ts
+++ b/tests/helpers/Participant.ts
@@ -122,7 +122,10 @@ export class Participant {
     async joinConference(ctx: IContext, options: IJoinOptions = {}): Promise<void> {
         const config = {
             room: ctx.roomName,
-            configOverwrite: this.config,
+            configOverwrite: {
+                ...this.config,
+                ...options.configOverwrite || {}
+            },
             interfaceConfigOverwrite: {
                 SHOW_CHROME_EXTENSION_BANNER: false
             }
diff --git a/tests/helpers/participants.ts b/tests/helpers/participants.ts
index 57e47de0cc5f..3d30217bbe02 100644
--- a/tests/helpers/participants.ts
+++ b/tests/helpers/participants.ts
@@ -28,26 +28,25 @@ export async function ensureOneParticipant(ctx: IContext, options?: IJoinOptions
  * Ensure that there are three participants.
  *
  * @param {Object} ctx - The context.
+ * @param {IJoinOptions} options - The options to use when joining the participant.
  * @returns {Promise<void>}
  */
-export async function ensureThreeParticipants(ctx: IContext): Promise<void> {
-    await joinTheModeratorAsP1(ctx);
-
-    const p2 = new Participant('participant2');
-    const p3 = new Participant('participant3');
-
-    ctx.p2 = p2;
-    ctx.p3 = p3;
+export async function ensureThreeParticipants(ctx: IContext, options?: IJoinOptions): Promise<void> {
+    await joinTheModeratorAsP1(ctx, options);
 
     // these need to be all, so we get the error when one fails
     await Promise.all([
-        p2.joinConference(ctx),
-        p3.joinConference(ctx)
+        _joinParticipant('participant2', ctx.p2, p => {
+            ctx.p2 = p;
+        }, options),
+        _joinParticipant('participant3', ctx.p3, p => {
+            ctx.p3 = p;
+        }, options)
     ]);
 
     await Promise.all([
-        p2.waitForRemoteStreams(2),
-        p3.waitForRemoteStreams(2)
+        ctx.p2.waitForRemoteStreams(2),
+        ctx.p3.waitForRemoteStreams(2)
     ]);
 }
 
diff --git a/tests/helpers/types.ts b/tests/helpers/types.ts
index e03e82ea1a10..c86b2bc474a5 100644
--- a/tests/helpers/types.ts
+++ b/tests/helpers/types.ts
@@ -1,3 +1,5 @@
+import { IConfig } from '../../react/features/base/config/configType';
+
 import type { Participant } from './Participant';
 import WebhookProxy from './WebhookProxy';
 
@@ -17,6 +19,11 @@ export type IContext = {
 
 export type IJoinOptions = {
 
+    /**
+     * Config overwrites to use.
+     */
+    configOverwrite?: IConfig;
+
     /**
      * Whether to skip setting display name.
      */
diff --git a/tests/specs/3way/codecSelection.spec.ts b/tests/specs/3way/codecSelection.spec.ts
new file mode 100644
index 000000000000..c81f6419ca64
--- /dev/null
+++ b/tests/specs/3way/codecSelection.spec.ts
@@ -0,0 +1,121 @@
+import { ensureOneParticipant, ensureThreeParticipants, ensureTwoParticipants } from '../../helpers/participants';
+
+describe('Codec selection - ', () => {
+    it('asymmetric codecs', async () => {
+        await ensureOneParticipant(ctx, {
+            configOverwrite: {
+                videoQuality: {
+                    codecPreferenceOrder: [ 'VP9', 'VP8', 'AV1' ]
+                }
+            }
+        });
+
+        await ensureTwoParticipants(ctx, {
+            configOverwrite: {
+                videoQuality: {
+                    codecPreferenceOrder: [ 'VP8', 'VP9', 'AV1' ]
+                }
+            }
+        });
+        const { p1, p2 } = ctx;
+
+        // Check if media is playing on both endpoints.
+        expect(await p1.driver.execute(() => JitsiMeetJS.app.testing.isLargeVideoReceived())).toBe(true);
+        expect(await p2.driver.execute(() => JitsiMeetJS.app.testing.isLargeVideoReceived())).toBe(true);
+
+        // Check if p1 is sending VP9 and p2 is sending VP8 as per their codec preferences.
+        // Except on Firefox because it doesn't support VP9 encode.
+        if (p1.driver.isFirefox) {
+            expect(await p1.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp8())).toBe(true);
+        } else {
+            expect(await p1.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp9())).toBe(true);
+        }
+
+        expect(await p2.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp8())).toBe(true);
+    });
+
+    it('asymmetric codecs with AV1', async () => {
+        await ensureThreeParticipants(ctx, {
+            configOverwrite: {
+                videoQuality: {
+                    codecPreferenceOrder: [ 'AV1', 'VP9', 'VP8' ]
+                }
+            }
+        });
+        const { p1, p2, p3 } = ctx;
+
+        // Check if media is playing on p3.
+        expect(await p3.driver.execute(() => JitsiMeetJS.app.testing.isLargeVideoReceived())).toBe(true);
+
+        // Check if p1 is encoding in VP9, p2 in VP8 and p3 in AV1 as per their codec preferences.
+        // Except on Firefox because it doesn't support AV1/VP9 encode and AV1 decode.
+        if (p1.driver.isFirefox) {
+            expect(await p1.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp8())).toBe(true);
+        } else {
+            expect(await p1.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp9())).toBe(true);
+        }
+
+        expect(await p2.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp8())).toBe(true);
+
+        // If there is a Firefox ep in the call, all other eps will switch to VP9.
+        if (p1.driver.isFirefox) {
+            expect(await p3.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp9())).toBe(true);
+        } else {
+            expect(await p3.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingAv1())).toBe(true);
+        }
+    });
+
+    it('codec switch over', async () => {
+        await Promise.all([ ctx.p1.hangup(), ctx.p2.hangup(), ctx.p3.hangup() ]);
+
+        await ensureTwoParticipants(ctx, {
+            configOverwrite: {
+                videoQuality: {
+                    codecPreferenceOrder: [ 'VP9', 'VP8', 'AV1' ]
+                }
+            }
+        });
+        const { p1, p2 } = ctx;
+
+        // Disable this test on Firefox because it doesn't support VP9 encode.
+        if (p1.driver.isFirefox) {
+            return;
+        }
+
+        // Check if p1 and p2 are encoding in VP9 which is the default codec.
+        expect(await p1.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp9())).toBe(true);
+        expect(await p2.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp9())).toBe(true);
+
+        await ensureThreeParticipants(ctx, {
+            configOverwrite: {
+                videoQuality: {
+                    codecPreferenceOrder: [ 'VP8' ]
+                }
+            }
+        });
+        const { p3 } = ctx;
+
+        // Check if all three participants are encoding in VP8 now.
+        expect(await p1.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp8())).toBe(true);
+        expect(await p2.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp8())).toBe(true);
+        expect(await p3.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp8())).toBe(true);
+
+        await p3.hangup();
+
+        // Check of p1 and p2 have switched to VP9.
+        await p1.driver.waitUntil(
+            async () => await p1.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp9()),
+            {
+                timeout: 10000,
+                timeoutMsg: 'p1 did not switch back to VP9'
+            }
+        );
+        await p2.driver.waitUntil(
+            async () => await p2.driver.execute(() => JitsiMeetJS.app.testing.isLocalCameraEncodingVp9()),
+            {
+                timeout: 10000,
+                timeoutMsg: 'p1 did not switch back to VP9'
+            }
+        );
+    });
+});