This tests :indeterminate pseudo class matches when there is no checked radio button in a radio button group. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". If a name isn't specified, it is in its own radio group. PASS r1_1.matches(":indeterminate") is true Setting indeterminate property shouldn't affect radio buttons. PASS r1_1.matches(":indeterminate") is true PASS r1_1.matches(":indeterminate") is false PASS r1_1.matches(":indeterminate") is false Changing checked should affect the matching of other buttons within the radio group. PASS r2_1.matches(":indeterminate") is true PASS r2_2.matches(":indeterminate") is true PASS r2_3.matches(":indeterminate") is true PASS r2_1.matches(":indeterminate") is false PASS r2_2.matches(":indeterminate") is false PASS r2_3.matches(":indeterminate") is false PASS r2_1.matches(":indeterminate") is false PASS r2_2.matches(":indeterminate") is false PASS r2_3.matches(":indeterminate") is false PASS r2_1.matches(":indeterminate") is true PASS r2_2.matches(":indeterminate") is true PASS r2_3.matches(":indeterminate") is true Adding/removing a button from a group should affect the matching. PASS r3_1.matches(":indeterminate") is false PASS r4_1.matches(":indeterminate") is true PASS r4_2.matches(":indeterminate") is true PASS r3_1.matches(":indeterminate") is false PASS r4_1.matches(":indeterminate") is false PASS r4_2.matches(":indeterminate") is false PASS r3_1.matches(":indeterminate") is false PASS r4_1.matches(":indeterminate") is true PASS r4_2.matches(":indeterminate") is true PASS successfullyParsed is true TEST COMPLETE