diff --git a/tests/integration/format-matrix-comprehensive.test.ts b/tests/integration/format-matrix-comprehensive.test.ts
index fb68826a..1762bdb6 100644
--- a/tests/integration/format-matrix-comprehensive.test.ts
+++ b/tests/integration/format-matrix-comprehensive.test.ts
@@ -927,7 +927,8 @@ describe("Extended conversion targets (core formats)", () => {
         if (fmt.name.toLowerCase() === target.format) continue;
         if (fmt.name === "AVIF" && target.format === "avif") continue;
 
-        it(`${fmt.name} -> ${target.format}`, async () => {
+        const testTimeout = target.format === "avif" ? 120_000 : 30_000;
+        it(`${fmt.name} -> ${target.format}`, { timeout: testTimeout }, async () => {
           const res = await callTool("convert", fmt, { format: target.format });
           if (!res) return;
           expect(res.statusCode).toBe(200);
diff --git a/tests/integration/format-matrix-expanded.test.ts b/tests/integration/format-matrix-expanded.test.ts
index afab9b87..c53f84e8 100644
--- a/tests/integration/format-matrix-expanded.test.ts
+++ b/tests/integration/format-matrix-expanded.test.ts
@@ -851,7 +851,8 @@ describe("SVG-to-raster", () => {
   const SVG_OUTPUT_FORMATS = ["png", "jpg", "webp", "avif"] as const;
 
   for (const outFmt of SVG_OUTPUT_FORMATS) {
-    it(`converts SVG to ${outFmt}`, async () => {
+    const testTimeout = outFmt === "avif" ? 120_000 : 30_000;
+    it(`converts SVG to ${outFmt}`, { timeout: testTimeout }, async () => {
       const fixturePath = join(FORMATS_DIR, "sample.svg");
       if (!existsSync(fixturePath)) return;