diff --git a/.github/bin/format-package-json.mjs b/.github/bin/format-package-json.mjs
index 144af8880..5db7b7df1 100644
--- a/.github/bin/format-package-json.mjs
+++ b/.github/bin/format-package-json.mjs
@@ -1,4 +1,5 @@
 import { promises as fsp, constants } from 'fs';
+import path from 'path';
 
 const packageJSONInfo = JSON.parse(await fsp.readFile('./package.json', 'utf8'));
 const packageJSONInfoCopy = JSON.stringify(packageJSONInfo, null, '\t');
@@ -199,7 +200,7 @@ const formatted = {};
 Object.assign(formatted, packageJSONInfo);
 
 if (process.env.GITHUB_ACTIONS && JSON.stringify(formatted, null, '\t') !== packageJSONInfoCopy) {
-	console.error('package.json has an incorrect field order. Run "npm run lint" to resolve.')
+	console.error(`::error file=${path.relative(process.env.GITHUB_WORKSPACE, path.resolve('./package.json'))},line=1,col=1::package.json has an incorrect field order. Run "npm run lint" to resolve.`);
 	process.exit(1);
 }
 
diff --git a/packages/postcss-tape/src/github-annotations.ts b/packages/postcss-tape/src/github-annotations.ts
index db8759287..2835e9f01 100644
--- a/packages/postcss-tape/src/github-annotations.ts
+++ b/packages/postcss-tape/src/github-annotations.ts
@@ -1,8 +1,17 @@
+import path from 'path';
+
 export function formatGitHubActionAnnotation(message, level = 'error', options = {}) {
 	let output = '::' + level;
 
 	const outputOptions = Object.keys(options).map((key) => {
-		return `${key}=${escapeValue(String(options[key]))}`;
+		let value = String(options[key]);
+
+		if (key === 'file' && process.env.GITHUB_WORKSPACE) {
+			// make file paths relative to the workspace root.
+			value = path.relative(process.env.GITHUB_WORKSPACE, path.resolve(value));
+		}
+
+		return `${key}=${escapeValue(value)}`;
 	}).join(',');
 
 	if (outputOptions) {
diff --git a/packages/postcss-tape/src/index.ts b/packages/postcss-tape/src/index.ts
index cc305393b..b67c8f9c5 100644
--- a/packages/postcss-tape/src/index.ts
+++ b/packages/postcss-tape/src/index.ts
@@ -248,7 +248,7 @@ export default function runner(currentPlugin: PluginCreator<unknown>) {
 						console.log(formatGitHubActionAnnotation(
 							formatCSSAssertError(testCaseLabel, testCaseOptions, err, true),
 							'error',
-							{ file: normalizeFilePathForGithubAnnotation(expectFilePath), line: 1, col: 1 },
+							{ file: expectFilePath, line: 1, col: 1 },
 						));
 					} else {
 						failureSummary.add(testCaseLabel);
@@ -344,7 +344,7 @@ export default function runner(currentPlugin: PluginCreator<unknown>) {
 						console.log(formatGitHubActionAnnotation(
 							'testing older PostCSS:\n' + formatCSSAssertError(testCaseLabel, testCaseOptions, err, true),
 							'error',
-							{ file: normalizeFilePathForGithubAnnotation(expectFilePath), line: 1, col: 1 },
+							{ file: expectFilePath, line: 1, col: 1 },
 						));
 					} else {
 						failureSummary.add(testCaseLabel);
@@ -366,7 +366,7 @@ export default function runner(currentPlugin: PluginCreator<unknown>) {
 						console.log(formatGitHubActionAnnotation(
 							formatWarningsAssertError(testCaseLabel, testCaseOptions, result.warnings(), testCaseOptions.warnings, true),
 							'error',
-							{ file: normalizeFilePathForGithubAnnotation(expectFilePath), line: 1, col: 1 },
+							{ file: expectFilePath, line: 1, col: 1 },
 						));
 					} else {
 						failureSummary.add(testCaseLabel);
@@ -390,22 +390,3 @@ export default function runner(currentPlugin: PluginCreator<unknown>) {
 		console.warn('pass ' + (currentPlugin() as Plugin).postcssPlugin);
 	};
 }
-
-function normalizeFilePathForGithubAnnotation(filePath: string) {
-	// Any plugin or packages is located in `<workspace>/<package>`;
-	const parts = process.cwd().split('/').slice(-2);
-
-	const workspaces = [
-		'packages',
-		'plugins',
-		'plugin-packs',
-		'cli',
-		'experimental',
-	];
-
-	if (!workspaces.includes(parts[0])) {
-		throw new Error('PostCSS Tape was intended to be run from <workspace>/<package>');
-	}
-
-	return path.join(parts.join('/'), filePath);
-}