diff --git a/frontend/blog_portal/cypress/e2e/signup_page.cy.ts b/frontend/blog_portal/cypress/e2e/signup_page.cy.ts
new file mode 100644
index 0000000..0752e66
--- /dev/null
+++ b/frontend/blog_portal/cypress/e2e/signup_page.cy.ts
@@ -0,0 +1,67 @@
+describe("signup page", function () {
+  beforeEach(function () {
+    cy.resetDb();
+    cy.clearMail();
+  });
+
+  it("creates an unconfirmed user and redirects to check-email", function () {
+    cy.visit("/signup");
+    cy.get('input[type="email"]').type("alice@example.com");
+    cy.get('input[autocomplete="username"]').type("alice");
+    cy.contains("button", "Continue").click();
+
+    cy.location("pathname").should("eq", "/check-email");
+    cy.contains("h1", "Check your email").should("be.visible");
+
+    cy.getMail().then(function (inbox) {
+      expect(inbox.messages).to.have.length(1);
+      expect(inbox.messages[0].To[0].Address).to.equal(
+        "alice@example.com",
+      );
+    });
+  });
+
+  it("surfaces a 409 when the email is already registered", function () {
+    cy.seedConfirmedUser({
+      email: "alice@example.com",
+      displayName: "alice",
+      password: "longenoughpassword",
+    });
+    cy.clearMail();
+
+    cy.visit("/signup");
+    cy.get('input[type="email"]').type("alice@example.com");
+    cy.get('input[autocomplete="username"]').type("alice2");
+    cy.contains("button", "Continue").click();
+
+    cy.location("pathname").should("eq", "/signup");
+    cy.contains(".error", "email already registered").should("be.visible");
+  });
+
+  it("surfaces a 409 when the display name is taken", function () {
+    cy.seedConfirmedUser({
+      email: "alice@example.com",
+      displayName: "alice",
+      password: "longenoughpassword",
+    });
+    cy.clearMail();
+
+    cy.visit("/signup");
+    cy.get('input[type="email"]').type("other@example.com");
+    cy.get('input[autocomplete="username"]').type("alice");
+    cy.contains("button", "Continue").click();
+
+    cy.location("pathname").should("eq", "/signup");
+    cy.contains(".error", "displayName already taken").should("be.visible");
+  });
+
+  it("blocks invalid display name characters client-side", function () {
+    cy.visit("/signup");
+    cy.get('input[type="email"]').type("alice@example.com");
+    cy.get('input[autocomplete="username"]').type("Has Spaces");
+    cy.contains("button", "Continue").click();
+
+    cy.location("pathname").should("eq", "/signup");
+    cy.get('input[autocomplete="username"]:invalid').should("exist");
+  });
+});