diff --git a/apps/client/cypress/e2e/specs/create-project.e2e.ts b/apps/client/cypress/e2e/specs/create-project.e2e.ts
index c9054e678..08a893070 100644
--- a/apps/client/cypress/e2e/specs/create-project.e2e.ts
+++ b/apps/client/cypress/e2e/specs/create-project.e2e.ts
@@ -7,7 +7,6 @@ const orgMi = organizations.find(({ name }) => name === 'mi') as Organization
 describe('Create Project', () => {
   const project = {
     orgId: orgMi.id,
-    orgName: orgMi.name,
     name: 'project01',
     slug: 'mi-project01',
     description: 'Application de prise de rendez-vous en préfécture.',
@@ -39,23 +38,23 @@ describe('Create Project', () => {
     cy.getByDataTestid('createProjectBtn').should('be.enabled').click()
 
     cy.wait('@postProject').its('response.statusCode').should('match', /^20\d$/)
-    cy.url().should('contain', `/projects/${project.slug}/dashboard`)
+    cy.url().should('match', /projects\/.*\/dashboard/)
 
     cy.wait('@listProjects').its('response.statusCode').should('match', /^20\d$/)
 
     cy.assertCreateProjects([project.slug])
   })
 
-  it('Should create a project even if name is already taken', () => {
+  it('Should not create a project if name is already taken', () => {
     cy.intercept('POST', '/api/v1/projects').as('postProject')
     cy.intercept('GET', '/api/v1/projects?filter=member&statusNotIn=archived').as('listProjects')
 
     cy.goToProjects()
       .getByDataTestid('createProjectLink').click()
       .get('select#organizationId-select').select(project.orgId)
-      .getByDataTestid('nameInput').type(project.name)
+      .getByDataTestid('nameInput').type(`${project.name}`)
     cy.getByDataTestid('createProjectBtn').should('be.enabled').click()
-    cy.wait('@postProject').its('response.statusCode').should('match', /^20\d$/)
-    cy.url().should('contain', `/projects/${project.orgName}-${project.name}-1/dashboard`)
+    cy.wait('@postProject').its('response.statusCode').should('not.match', /^20\d$/)
+    cy.getByDataTestid('snackbar').should('contain', `Le projet "${project.name}" existe déjà`)
   })
 })
diff --git a/apps/server/src/resources/project/business.ts b/apps/server/src/resources/project/business.ts
index 0173af0c3..335f0186d 100644
--- a/apps/server/src/resources/project/business.ts
+++ b/apps/server/src/resources/project/business.ts
@@ -9,6 +9,7 @@ import {
   deleteAllRepositoryForProject,
   getAllProjectsDataForExport,
   getOrganizationById,
+  getProjectByNames,
   getProjectOrThrow,
   getSlugs,
   initializeProject,
@@ -74,6 +75,11 @@ export async function createProject(dataDto: typeof projectContract.createProjec
   if (!organization) return new BadRequest400('Organisation introuvable')
   if (!organization.active) return new BadRequest400('Organisation inactive')
 
+  const projectSearch = await getProjectByNames({ name: dataDto.name, organizationName: organization.name })
+  if (projectSearch) {
+    return new BadRequest400(`Le projet "${dataDto.name}" existe déjà`)
+  }
+
   let slug = `${organization.name}-${dataDto.name}`
   const projectsWithSamePrefix = await getSlugs(slug)
   slug = generateSlug(slug, projectsWithSamePrefix?.map(project => project.slug))
diff --git a/apps/server/src/resources/project/queries.ts b/apps/server/src/resources/project/queries.ts
index 3423e2b29..853a48697 100644
--- a/apps/server/src/resources/project/queries.ts
+++ b/apps/server/src/resources/project/queries.ts
@@ -187,6 +187,20 @@ export function getProjectInfosAndRepos(id: Project['id']) {
   })
 }
 
+interface GetProjectByNameParams {
+  name: Project['name']
+  organizationName: Organization['name']
+}
+
+export function getProjectByNames({ name, organizationName }: GetProjectByNameParams) {
+  return prisma.project.findFirst({
+    where: {
+      name,
+      organization: { name: organizationName },
+    },
+  })
+}
+
 export function getSlugs(slugPrefix: string) {
   return prisma.project.findMany({
     where: {