diff --git a/pkg/base1/test-spawn-proc.js b/pkg/base1/test-spawn-proc.js
index 440877d75696..896cd691cf40 100644
--- a/pkg/base1/test-spawn-proc.js
+++ b/pkg/base1/test-spawn-proc.js
@@ -174,7 +174,7 @@ QUnit.test("pty", async assert => {
 
 QUnit.test("pty window size", async assert => {
     try {
-        const proc = cockpit.spawn(['tput', 'lines', 'cols'], { err: "message", pty: true, window: { rows: 77, cols: 88 } });
+        const proc = cockpit.spawn(['strace', '-fvvs1024', 'tput', 'lines', 'cols'], { err: "message", pty: true, window: { rows: 77, cols: 88 } });
         assert.equal(await proc, '77\r\n88\r\n', 'Correct rows and columns');
     } catch (ex) {
         assert.equal(ex, "foo", "XXX failed");