How can i optimise Nightwatch VRT results, because it shows the same things for several times like this :

√ Element <//*[@id="width"]> was visible after 22 milliseconds.
√ Passed [ok]: The screenshot for selector <//*[@id="width"]> was captured successfully.
√ Element <//*[@id="width"]> was visible after 36 milliseconds.
√ Passed [ok]: The screenshot for selector <//*[@id="width"]> was captured successfully.
√ Element <//*[@id="width"]> was visible after 50 milliseconds.
√ Passed [ok]: The screenshot for selector <//*[@id="width"]> was captured successfully.
√ Element <//*[@id="width"]> was visible after 43 milliseconds.
√ Passed [ok]: The screenshot for selector <//*[@id="width"]> was captured successfully.
√ Element <//*[@id="width"]> was visible after 55 milliseconds.
√ Passed [ok]: The screenshot for selector <//*[@id="width"]> was captured successfully.
√ Element <//*[@id="width"]> was visible after 54 milliseconds.
√ Passed [ok]: The screenshot for selector <//*[@id="width"]> was captured successfully.
√ Element <//*[@id="width"]> was visible after 44 milliseconds.
√ Passed [ok]: The screenshot for selector <//*[@id="width"]> was captured successfully.
× VRT complete in 5000ms - expected "true" but got .........

Any ideas ?