Intellij not shows test results in console

Another possibility is that your logging is maybe configured to be written to a file. If this is the case, you can uncheck the 'Save console output to file' option.

In IDEA 12,13 and 14 (also maybe other versions), there is a button "Hide passed tests" and is pressed by default:

The console output is missing some of the printed strings (the last ones). When you uncheck the button and click on the test:

Then the output is shown in the console.

I got it! There is an configuration option in bottom run panel, and by default "Track running test" is checked, when I unchecked it the output stays and is no more replaced by summary.