diff --git a/pc/peer_connection_simulcast_unittest.cc b/pc/peer_connection_simulcast_unittest.cc
index 27896a8889..92c0eba008 100644
--- a/pc/peer_connection_simulcast_unittest.cc
+++ b/pc/peer_connection_simulcast_unittest.cc
@@ -168,7 +168,11 @@ const webrtc::RTCOutboundRtpStreamStats* FindOutboundRtpByRid(
 namespace webrtc {
 
 constexpr TimeDelta kDefaultTimeout = TimeDelta::Seconds(5);
+
+// Only used by tests disabled under ASAN, avoids unsued variable compile error.
+#if !defined(ADDRESS_SANITIZER)
 constexpr TimeDelta kLongTimeoutForRampingUp = TimeDelta::Seconds(30);
+#endif  // !defined(ADDRESS_SANITIZER)
 
 class PeerConnectionSimulcastTests : public ::testing::Test {
  public:
@@ -1137,6 +1141,12 @@ TEST_F(PeerConnectionSimulcastWithMediaFlowTests,
   EXPECT_THAT(*outbound_rtps[0]->scalability_mode, StrEq("L1T1"));
 }
 
+// TODO(https://crbug.com/webrtc/15018): Investigate heap-use-after free during
+// shutdown of the test that is flakily happening on bots. It's not only
+// happening on ASAN, but it is rare enough on non-ASAN that we don't have to
+// disable everywhere.
+#if !defined(ADDRESS_SANITIZER)
+
 TEST_F(PeerConnectionSimulcastWithMediaFlowTests,
        SendingThreeEncodings_VP8_Simulcast) {
   rtc::scoped_refptr<PeerConnectionTestWrapper> local_pc_wrapper = CreatePc();
@@ -1622,4 +1632,6 @@ TEST_F(PeerConnectionSimulcastWithMediaFlowTests,
   EXPECT_THAT(*outbound_rtps[2]->scalability_mode, StrEq("L1T3"));
 }
 
+#endif  // !defined(ADDRESS_SANITIZER)
+
 }  // namespace webrtc