rails test output carry return do not work

I run rails test and the output is:

Started with run options --seed 41744

Run options: --seed 41744--=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=] 0% Time: 00:00:00, ETA: ??:??:??

Running:

. 831/2: [ ] 0% Time: 00:00:00, ETA: 00:04:2

. 831/3: [ ] 0% Time: 00:00:00, ETA: 00:02:5

. 831/4: [ ] 0% Time: 00:00:01, ETA: 00:03:3

. 831/5: [ ] 0% Time: 00:00:01, ETA: 00:03:0

. 831/6: [ ] 0% Time: 00:00:01, ETA: 00:02:3

. 831/7: [ ] 0% Time: 00:00:01, ETA: 00:02:2

. 831/8: [ ] 0% Time: 00:00:01, ETA: 00:02:2

. 831/9: [= ] 1% Time: 00:00:01, ETA: 00:02:1

. 831/10: [= ] 1% Time: 00:00:01, ETA: 00:02:0

...

...

Every test is a new line, but the correct behavor is same line always