R testthat not reporting failiures or errors

I am finding some weird results using testthat. When running test_file, individual test_that calls are discovered but there is no output to the console other than the name of the context and the returned data.frame does not have the expected results. I suspect I am doing something really dumb but have tried lots of alternatives and get the same outcome.

Here is my tests.r file:

context("The universe")

test_that('the answer is right',function(){
    # Should be OK
    expect_equal(42,42)
})

test_that('the question is wrong',function(){
    what_is_the_meaning <- function(){
        42
    }
    # Should fail
    expect_equal(what_is_the_meaning,NULL)
})

test_that('an error occurs',function(){
    # Should cause an error because undefined
    authur^4
})

I run test_file on it:

> require(testthat)
Loading required package: testthat
> test_file('tests.r')
The universe : 

> results <- test_file('tests.r')
The universe : 

> results
     file      context                  test nb failed error  user system  real
1 tests.r The universe   the answer is right  0      0 FALSE 0.004      0 0.002
2 tests.r The universe the question is wrong  0      0 FALSE 0.000      0 0.000
3 tests.r The universe       an error occurs  0      0 FALSE 0.004      0 0.001

As you can see, no console output and in the results data.frame instead of having one failed test and one with an error it looks like everything has passed.

This is what I am running:

> sessionInfo()
R version 3.1.2 (2014-10-31)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_NZ.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_NZ.UTF-8        LC_COLLATE=en_NZ.UTF-8    
 [5] LC_MONETARY=en_NZ.UTF-8    LC_MESSAGES=en_NZ.UTF-8   
 [7] LC_PAPER=en_NZ.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_NZ.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] testthat_0.9.1