diff --git a/src/lib/writers/ResultsWriter.ts b/src/lib/writers/ResultsWriter.ts
index 0f6acf073..3d3685977 100644
--- a/src/lib/writers/ResultsWriter.ts
+++ b/src/lib/writers/ResultsWriter.ts
@@ -35,7 +35,7 @@ export class ResultsFileWriter implements ResultsWriter {
 		} else if (['.html', '.htm'].includes(ext)) {
 			this.format = OutputFormat.HTML;
 		} else if (ext === '.sarif' || file.toLowerCase().endsWith('.sarif.json')) {
-			throw new Error('TODO: Support SARIF-type output');
+			this.format = OutputFormat.SARIF;
 		// Check for `.json` AFTER checking for `.sarif.json`!
 		} else if (ext === '.json') {
 			this.format = OutputFormat.JSON;
diff --git a/test/lib/writers/ResultsWriter.test.ts b/test/lib/writers/ResultsWriter.test.ts
index b8f2ca632..c85380bf2 100644
--- a/test/lib/writers/ResultsWriter.test.ts
+++ b/test/lib/writers/ResultsWriter.test.ts
@@ -23,8 +23,8 @@ describe('ResultsWriter implementations', () => {
 			{ext: '.html', expectedOutput: `Results formatted as ${OutputFormat.HTML}`},
 			{ext: '.htm', expectedOutput: `Results formatted as ${OutputFormat.HTML}`},
 			{ext: '.json', expectedOutput: `Results formatted as ${OutputFormat.JSON}`},
-			//{ext: '.sarif', expectedOutput: `Results formatted as ${OutputFormat.SARIF}`},
-			//{ext: '.sarif.json', expectedOutput: `Results formatted as ${OutputFormat.SARIF}`},
+			{ext: '.sarif', expectedOutput: `Results formatted as ${OutputFormat.SARIF}`},
+			{ext: '.sarif.json', expectedOutput: `Results formatted as ${OutputFormat.SARIF}`},
 			{ext: '.xml', expectedOutput: `Results formatted as ${OutputFormat.XML}`}
 		])('Accepts and outputs valid file format: *$ext', ({ext, expectedOutput}) => {
 			const validFile = `beep${ext}`;
@@ -40,20 +40,6 @@ describe('ResultsWriter implementations', () => {
 			}]);
 		});
 
-		/**
-		 * All of these extensions are ones we intend to support long-term, but don't yet. When we add support for one of
-		 * these extensions, we should remove it from the cases array here and uncomment the corresponding line
-		 * in the case array for the valid format tests.
-		 */
-		it.each([
-			{ext: '.sarif'},
-			{ext: '.sarif.json'}
-		])('Throws TODO error for not-yet-supported format: *$ext', ({ext}) => {
-			const notYetSupportedFile = `beep${ext}`;
-			// Expect the error message to include an indication that the functionality will be implemented eventually.
-			expect(() => new ResultsFileWriter(notYetSupportedFile)).toThrow('TODO');
-		});
-
 		it('Writes file even when results are empty', () => {
 			const expectations = {
 				file: 'beep.csv',