@@ -169,6 +169,9 @@ export function assertNoDisableDirectives(source, lineNumbers, filePath) {
 		for (const range of ranges ?? []) {
 			if (seen.has(range.pos)) continue
 			seen.add(range.pos)
+			// getLeadingCommentRanges is text-based: inside JSX, directive-looking rendered text
+			// (e.g. <div> // Stryker disable all) is JsxText, not a comment, and must not fail.
+			if (ts.getTokenAtPosition(sourceFile, range.pos).kind === ts.SyntaxKind.JsxText) continue
 			if (!SUPPRESSION_DIRECTIVE.test(source.slice(range.pos, range.end))) continue
 			const lineNumber = (source.slice(0, range.pos).match(/\n/g)?.length ?? 0) + 1
 			if (lineNumbers.has(lineNumber)) {
 
@@ -654,6 +654,25 @@ describe("Stryker suppression directive prohibition", () => {
 		)
 	})
 
+	it("ignores directive-looking JSX text in tsx sources", () => {
+		assert.doesNotThrow(() =>
+			assertNoDisableDirectives(
+				"const el = <div> // Stryker disable all\n</div>\n",
+				new Set([1, 2]),
+				"source.tsx",
+			),
+		)
+		assert.throws(
+			() =>
+				assertNoDisableDirectives(
+					"const el = <div>{ // Stryker disable next-line all: reason\nx}</div>\n",
+					new Set([1, 2]),
+					"source.tsx",
+				),
+			/Stryker suppression comments are not allowed/,
+		)
+	})
+
 	it("accepts sources without suppression comments", () => {
 		assert.doesNotThrow(() => assertNoDisableDirectives("return value <= limit\n", new Set([1]), "source.ts"))
 		assert.doesNotThrow(() =>