This test makes sure that minimumFontSize affects line-height. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS Math.round(parseFloat(window.getComputedStyle(document.getElementById('test1')).getPropertyValue('line-height'))) is comparisonLineHeight PASS Math.round(parseFloat(window.getComputedStyle(document.getElementById('test2')).getPropertyValue('line-height'))) is comparisonLineHeight PASS Math.round(parseFloat(window.getComputedStyle(document.getElementById('test3')).getPropertyValue('line-height'))) is 20 / 16 * 64 PASS Math.round(parseFloat(window.getComputedStyle(document.getElementById('test4')).getPropertyValue('line-height'))) is 20 / 10 * 64 PASS Math.round(parseFloat(window.getComputedStyle(document.getElementById('test5')).getPropertyValue('line-height'))) is 1.5 * 64 PASS Math.round(parseFloat(window.getComputedStyle(document.getElementById('test6')).getPropertyValue('line-height'))) is 1.5 * 64 PASS Math.round(parseFloat(window.getComputedStyle(document.getElementById('test7')).getPropertyValue('line-height'))) is 1.5 * 64 PASS Math.round(parseFloat(window.getComputedStyle(document.getElementById('test8')).getPropertyValue('line-height'))) is 1.5 * 64 PASS Math.round(parseFloat(window.getComputedStyle(document.getElementById('test9')).getPropertyValue('line-height'))) is 192 PASS successfullyParsed is true TEST COMPLETE 1: Hello World 1: Hello World 2: Hello World 3: Hello World 4: Hello World 5: Hello World 6: Hello World 7: Hello World 8: Hello World 9: Hello World