diff --git a/test/scenario/scenario_unittest.cc b/test/scenario/scenario_unittest.cc
index e3abd48..320670d 100644
--- a/test/scenario/scenario_unittest.cc
+++ b/test/scenario/scenario_unittest.cc
@@ -85,6 +85,12 @@
 }
 }  // namespace
 
+// TODO(bugs.webrtc.org/10515): Remove this when performance has been improved.
+#if defined(WEBRTC_IOS) && defined(WEBRTC_ARCH_ARM64) && !defined(NDEBUG)
+#define MAYBE_SimTimeEncoding DISABLED_SimTimeEncoding
+#else
+#define MAYBE_SimTimeEncoding SimTimeEncoding
+#endif
 TEST(ScenarioTest, MAYBE_SimTimeEncoding) {
   VideoQualityAnalyzerConfig analyzer_config;
   analyzer_config.psnr_coverage = 0.1;
@@ -99,6 +105,7 @@
   EXPECT_EQ(analyzer.stats().lost_count, 0);
 }
 
+// TODO(bugs.webrtc.org/10515): Remove this when performance has been improved.
 #if defined(WEBRTC_IOS) && defined(WEBRTC_ARCH_ARM64) && !defined(NDEBUG)
 #define MAYBE_RealTimeEncoding DISABLED_RealTimeEncoding
 #else