diff --git a/src/net/http/client_test.go b/src/net/http/client_test.go
index ea59f68f35f6b4..e91d5268244db8 100644
--- a/src/net/http/client_test.go
+++ b/src/net/http/client_test.go
@@ -1339,6 +1339,9 @@ func testClientTimeout_Headers(t *testing.T, h2 bool) {
 		t.Error("net.Error.Timeout = false; want true")
 	}
 	if got := ne.Error(); !strings.Contains(got, "Client.Timeout exceeded") {
+		if runtime.GOOS == "windows" && strings.HasPrefix(runtime.GOARCH, "arm") {
+			testenv.SkipFlaky(t, 43120)
+		}
 		t.Errorf("error string = %q; missing timeout substring", got)
 	}
 }