rspec stub giving wrong number of arguments error - ruby-on-rails

Question

I am upgrading from rails 3.2.19 to rails 4.1.5. I am using rspec-rails 2.14.0.rc1.
With rails 4.1.5 all my tests are passing, except for a handful that use stub. The ones that are failing are of the form:
ENV.stub(:[]).with("ADWORDS_RUN").and_return("Yes")
Rails.stub(env: ActiveSupport::StringInquirer.new("production"))
Kernel.stub(:rand).and_return(2)
Each is returning ArgumentError: wrong number of arguments (1 for 2+). All were passing in rails 3.2.19. I have tried going back to rspec-rails 2.8.1, but same error. Also rails 4.0, but the error persists. The last error (stubbing :rand) does not occur when I run the whole test suite but does occur when I run the individual test file for that test. Here is an example test
it "should have google tracking code in production" do
Rails.stub(env: ActiveSupport::StringInquirer.new("production"))
get :home
response.body.should =~ /Google Analytics Tracking code/
end
and here is the output from the test:
Failure/Error: Rails.stub(env: ActiveSupport::StringInquirer.new("production"))
ArgumentError:
wrong number of arguments (1 for 2+)
# ./spec/controllers/pages_controller_spec.rb:107:in `block (4 levels) in <top (required)>'
Line 107 is the Rails.stub line.
Please let me know how to rectify this problem?

Answer 1

I did not manage to find the cause of this problem, but I did find a workaround. It was to change all the stub statements to the newer rspec allow syntax. So for example
Rails.stub(env: ActiveSupport::StringInquirer.new("production"))
becomes
allow(Rails).to receive(:env).and_return(ActiveSupport::StringInquirer.new("production"))
I did this using rspec-rails 2.14.0.rc1. This fixed the problem.
Thank you for the comments, they either clarified my question or pointed me in the right direction.