Hard code the assertion messages

spec/system/users/forgot_password_spec.rb

@@ -11,7 +11,7 @@
   #   Then I see an invalid credentials message
   scenario 'user cannot forgot password if not registered', js: true do
     forgot_password('test@example.com')
-    expect(page).to have_content "Email *\n" + I18n.t('errors.messages.not_found')
+    expect(page).to have_content "Email *\nnot found"
   end
 
   # Scenario: User can forgot password with valid credentials
@@ -22,7 +22,7 @@
   scenario 'user can forgot password with valid credentials', js: true do
     user = FactoryBot.create(:user)
     forgot_password(user.email)
-    expect(page).to have_content I18n.t 'devise.passwords.send_instructions'
+    expect(page).to have_content 'You will receive an email with instructions on how to reset your password in a few minutes.'
   end
 
   # Scenario: User cannot forgot password with wrong email
@@ -32,7 +32,7 @@
   #   Then I see an invalid email message
   scenario 'user cannot forgot password with wrong email', js: true do
     forgot_password('invalid@email.com')
-    expect(page).to have_content "Email *\n" + I18n.t('errors.messages.not_found')
+    expect(page).to have_content "Email *\nnot found"
   end
 
 end

spec/system/users/sign_in_spec.rb

@@ -11,7 +11,7 @@
   #   Then I see an invalid credentials message
   scenario 'user cannot sign in if not registered' do
     signin('test@example.com', 'please123')
-    expect(page).to have_content I18n.t 'devise.failure.not_found_in_database', authentication_keys: 'Email'
+    expect(page).to have_content 'Invalid Email or password.'
   end
 
   # Scenario: User can sign in with valid credentials
@@ -22,7 +22,7 @@
   scenario 'user can sign in with valid credentials' do
     user = FactoryBot.create(:user)
     signin(user.email, user.password)
-    expect(page).to have_content I18n.t 'devise.sessions.signed_in'
+    expect(page).to have_content 'Signed in successfully.'
   end
 
   # Scenario: User cannot sign in with wrong email
@@ -33,7 +33,7 @@
   scenario 'user cannot sign in with wrong email' do
     user = FactoryBot.create(:user)
     signin('invalid@email.com', user.password)
-    expect(page).to have_content I18n.t 'devise.failure.not_found_in_database', authentication_keys: 'Email'
+    expect(page).to have_content 'Invalid Email or password.'
   end
 
   # Scenario: User cannot sign in with wrong password
@@ -44,7 +44,7 @@
   scenario 'user cannot sign in with wrong password' do
     user = FactoryBot.create(:user)
     signin(user.email, 'invalidpass')
-    expect(page).to have_content I18n.t 'devise.failure.invalid', authentication_keys: 'Email', normalize_ws: true
+    expect(page).to have_content 'Invalid Email or password.'
   end
 
   # Scenario: Organizer User gets redirected to the events_path

spec/system/users/sign_out_spec.rb

@@ -13,13 +13,13 @@
 
     user = FactoryBot.create(:user)
     signin(user.email, user.password)
-    expect(page).to have_content I18n.t 'devise.sessions.signed_in'
+    expect(page).to have_content 'Signed in successfully.'
 
     find('.gravatar-container').click
 
     find('.dropdown-menu').find('a', text: 'Sign Out').click
 
-    expect(page).to have_no_content I18n.t('devise.sessions.signed_in')
-    expect(page).to have_content I18n.t 'devise.sessions.signed_out'
+    expect(page).to have_no_content 'Signed in successfully.'
+    expect(page).to have_content 'Signed out successfully.'
   end
 end

spec/system/users/sign_up_spec.rb

@@ -49,6 +49,6 @@
   scenario 'user can sign up with valid credentials' do
     user = build(:user)
     sign_up_with(user.email, user.password, user.password)
-    expect(page).to have_content I18n.t('devise.registrations.signed_up_but_unconfirmed')
+    expect(page).to have_content 'A message with a confirmation link has been sent to your email address. Please follow the link to activate your account.'
   end
 end