diff --git a/.github/workflows/end-to-end.yml b/.github/workflows/end-to-end.yml
index 3ce14a21..39954ab1 100644
--- a/.github/workflows/end-to-end.yml
+++ b/.github/workflows/end-to-end.yml
@@ -51,6 +51,7 @@ jobs:
           - signin_with_email_verification_renewal
           - signin_with_magic_link
           - signin_with_totp
+          - signin_with_webauthn
           - signup_entreprise_unipersonnelle
           - update_personal_information
           - update_totp_application
diff --git a/cypress/e2e/signin_with_webauthn/env.conf b/cypress/e2e/signin_with_webauthn/env.conf
new file mode 100644
index 00000000..712d7471
--- /dev/null
+++ b/cypress/e2e/signin_with_webauthn/env.conf
@@ -0,0 +1,2 @@
+DO_NOT_AUTHENTICATE_BROWSER=False
+DO_NOT_SEND_MAIL=True
diff --git a/cypress/e2e/signin_with_webauthn/fixtures.sql b/cypress/e2e/signin_with_webauthn/fixtures.sql
new file mode 100644
index 00000000..bda36a35
--- /dev/null
+++ b/cypress/e2e/signin_with_webauthn/fixtures.sql
@@ -0,0 +1,45 @@
+INSERT INTO users
+  (id, email, email_verified, email_verified_at, encrypted_password, created_at, updated_at,
+   given_name, family_name, phone_number, job)
+VALUES
+  (1, 'unused1@yopmail.com', true, CURRENT_TIMESTAMP,
+   '$2a$10$kzY3LINL6..50Fy9shWCcuNlRfYq0ft5lS.KCcJ5PzrhlWfKK4NIO', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP,
+   'Jean', 'Jean', '0123456789', 'Sbire');
+
+INSERT INTO organizations
+(id, siret, created_at, updated_at)
+VALUES
+  (1, '21340126800130', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP);
+
+INSERT INTO users_organizations
+  (user_id, organization_id, is_external, verification_type, has_been_greeted)
+VALUES
+  (1, 1, false, 'verified_email_domain', true);
+
+INSERT INTO authenticators
+  (credential_id, credential_public_key, counter, credential_device_type, credential_backed_up,
+   transports, user_id, display_name, created_at, last_used_at, usage_count, user_verified)
+VALUES
+  ('Bdf73ipOxFEpTjCr4FqGYnLsWAKU/s6eLh2a32GihKo=',
+   '\xa401010327200621582015a9f4727d84c47413e94c4b5109aee81a0ec9d1e610ff5d522eb9f8e2af927a',
+--    '\x3059301306072a8648ce3d020106082a8648ce3d0301070342000495886e1804854510af5d8cb4943c0caa1ae25eef46226258e9175eb461783e000f67da1363dab497ea492d7fd5ffd855f5d34158d02c89999dce353dcd1b1dcd',
+--    '\xa50102032620012158203644bd38776918bb7d83059369ddbb634bd207df223153674c20994f91ca97bf2258203d6bd21d1da555db3eb6590a34e003642c9602670203d451b2adb9302ab1325a',
+   0, 'singleDevice', false, ARRAY ['internal'], 1, null, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP, 1, true);
+
+INSERT INTO oidc_clients
+(client_name, client_id, client_secret, redirect_uris,
+ post_logout_redirect_uris, scope, client_uri, client_description,
+ userinfo_signed_response_alg, id_token_signed_response_alg,
+ authorization_signed_response_alg, introspection_signed_response_alg)
+VALUES
+  ('Oidc Test Client',
+   'standard_client_id',
+   'standard_client_secret',
+   ARRAY [
+     'http://localhost:4000/login-callback'
+     ],
+   ARRAY []::varchar[],
+   'openid email profile organization',
+   'http://localhost:4000/',
+   'MonComptePro test client. More info: https://github.com/numerique-gouv/moncomptepro-test-client.',
+   null, null, null, null);
diff --git a/cypress/e2e/signin_with_webauthn/index.cy.ts b/cypress/e2e/signin_with_webauthn/index.cy.ts
new file mode 100644
index 00000000..e701ef80
--- /dev/null
+++ b/cypress/e2e/signin_with_webauthn/index.cy.ts
@@ -0,0 +1,70 @@
+// Passkey crypto elements where generated with Webauthn Chrome dev tools.
+// We create a virtual authenticator with these tools.
+// We used it on a local instance of MonComptePro.
+// We exported the private key from the dev tools.
+// We exported the record of the authenticator from MonComptePro local database.
+
+describe("sign-in with webauthn on untrusted browser", () => {
+  before(async () => {
+    await Cypress.automation("remote:debugger:protocol", {
+      command: "WebAuthn.enable",
+    });
+  });
+
+  it("should sign-in with webauthn", function () {
+    Cypress.automation("remote:debugger:protocol", {
+      command: "WebAuthn.addVirtualAuthenticator",
+      params: {
+        options: {
+          protocol: "ctap2",
+          transport: "internal",
+          hasResidentKey: true,
+          hasUserVerification: true,
+          isUserVerified: true,
+        },
+      },
+    }).then(({ authenticatorId }) => {
+      Cypress.automation("remote:debugger:protocol", {
+        command: "WebAuthn.addCredential",
+        params: {
+          authenticatorId,
+          credential: {
+            credentialId: "Bdf73ipOxFEpTjCr4FqGYnLsWAKU/s6eLh2a32GihKo=",
+            isResidentCredential: true,
+            userHandle: "MQ==", // unused1@yopmail.com
+            rpId: "localhost",
+            privateKey:
+              "MC4CAQAwBQYDK2VwBCIEIC5SpNCKBGOjrii3D7Ao5tsyPCiNdUHdZt78j6z2xQlR",
+            signCount: 0,
+          },
+        },
+      });
+    });
+
+    cy.visit("http://localhost:4000");
+    cy.get("button.moncomptepro-button").click();
+
+    cy.get('[name="login"]').type("unused1@yopmail.com");
+    cy.get('[type="submit"]').click();
+
+    cy.get('[href="/users/sign-in-with-passkey"]')
+      .contains("Se connecter avec une clé d’accès")
+      .click();
+
+    cy.contains("Se connecter avec une clé d’accès");
+
+    cy.get("#webauthn-btn-begin-authentication").contains("Continuer").click();
+    // An error is thrown here:
+    // The 'publickey-credentials-get' feature is not enabled in this document.
+    // See https://github.com/cypress-io/cypress/issues/6991#issuecomment-2168311131
+
+    cy.contains('"amr": [\n    "pop",\n    "mfa"\n  ],');
+  });
+});
+
+// TODO test the amr result in the following cases
+// TODO login with webauthn and userVerified=true
+// TODO unable to login with webauthn and userVerified=false
+// TODO login with password + webauthn and userVerified=false
+// TODO login with password + webauthn and userVerified=true
+// TODO a second factor should not trigger email verification for untrusted browser reason