diff --git a/render/index.js b/render/index.js
index 395bb9a..ddbdb15 100644
--- a/render/index.js
+++ b/render/index.js
@@ -68,7 +68,7 @@ function buildTestResultsTable(data) {
 	const fields = [
 		{label: 'Test', field: 'test', tags_func: sectionLink},
 		{label: 'Channel', field: 'channel', tags_func: sectionLink},
-		{label: 'Diff, %', field: 'diff_pct'},
+		{label: 'Δ, %', field: 'diff_pct'},
 		{label: 'Failed', field: 'fail'},
 	];
 
@@ -92,7 +92,7 @@ function buildSummary(data) {
 function buildTestResultImages(data) {
 	return data.flatMap((d) => {
 		return Tag('details', {id: makeId(d)}, null, [
-			Tag('summary', null, `${d.test}/${d.channel} diff=${d.diff_pct}`),
+			Tag('summary', null, `${d.test}/${d.channel} δ=${d.diff_pct}`),
 			Tag('img', {src: d.image_diff}),
 			Tag('img', {src: d.image_flip}),
 		]);