This is a testharness.js-based test. [FAIL] CSS Transitions: property from [url(../resources/stripes-20.png)] to [url(../resources/stripes-20.png)] at (0.3) is [url(file:///.../stripes-20.png)] assert_equals: expected "cross - fade ( url ( file : / / / ... / stripes - 20.png ) 70 % , url ( file : / / / ... / stripes - 20.png ) ) " but got "url ( file : / / / ... / stripes - 20.png ) " [FAIL] CSS Transitions: property from [url(../resources/stripes-20.png)] to [url(../resources/stripes-20.png)] at (0.5) is [url(file:///.../stripes-20.png)] assert_equals: expected "cross - fade ( url ( file : / / / ... / stripes - 20.png ) 50 % , url ( file : / / / ... / stripes - 20.png ) ) " but got "url ( file : / / / ... / stripes - 20.png ) " [FAIL] CSS Transitions: property from [url(../resources/stripes-20.png)] to [url(../resources/stripes-20.png)] at (0.6) is [url(file:///.../stripes-20.png)] assert_equals: expected "cross - fade ( url ( file : / / / ... / stripes - 20.png ) 40 % , url ( file : / / / ... / stripes - 20.png ) ) " but got "url ( file : / / / ... / stripes - 20.png ) " [FAIL] CSS Transitions with transition: all: property from [url(../resources/stripes-20.png)] to [url(../resources/stripes-20.png)] at (0.3) is [url(file:///.../stripes-20.png)] assert_equals: expected "cross - fade ( url ( file : / / / ... / stripes - 20.png ) 70 % , url ( file : / / / ... / stripes - 20.png ) ) " but got "url ( file : / / / ... / stripes - 20.png ) " [FAIL] CSS Transitions with transition: all: property from [url(../resources/stripes-20.png)] to [url(../resources/stripes-20.png)] at (0.5) is [url(file:///.../stripes-20.png)] assert_equals: expected "cross - fade ( url ( file : / / / ... / stripes - 20.png ) 50 % , url ( file : / / / ... / stripes - 20.png ) ) " but got "url ( file : / / / ... / stripes - 20.png ) " [FAIL] CSS Transitions with transition: all: property from [url(../resources/stripes-20.png)] to [url(../resources/stripes-20.png)] at (0.6) is [url(file:///.../stripes-20.png)] assert_equals: expected "cross - fade ( url ( file : / / / ... / stripes - 20.png ) 40 % , url ( file : / / / ... / stripes - 20.png ) ) " but got "url ( file : / / / ... / stripes - 20.png ) " Harness: the test ran to completion.