diff --git a/pc/composite_rtp_transport.cc b/pc/composite_rtp_transport.cc
index 61d9990d1d..bdeaacd116 100644
--- a/pc/composite_rtp_transport.cc
+++ b/pc/composite_rtp_transport.cc
@@ -73,6 +73,8 @@ void CompositeRtpTransport::RemoveTransport(RtpTransportInternal* transport) {
 
   auto it = absl::c_find(transports_, transport);
   if (it == transports_.end()) {
+    RTC_NOTREACHED() << "Callers should not remove transports they did not "
+                        "include in the composite";
     return;
   }
 
diff --git a/pc/jsep_transport_controller_unittest.cc b/pc/jsep_transport_controller_unittest.cc
index 7b91ad8138..353a659712 100644
--- a/pc/jsep_transport_controller_unittest.cc
+++ b/pc/jsep_transport_controller_unittest.cc
@@ -2415,51 +2415,6 @@ TEST_P(JsepTransportControllerDatagramTest, RenegotiationCannotRemoveDatagram) {
             fake_params);
 }
 
-TEST_P(JsepTransportControllerDatagramTest,
-       RenegotiationKeepsDatagramTransport) {
-  cricket::OpaqueTransportParameters fake_params = CreateTransportParameters();
-  if (IsOfferer()) {
-    EXPECT_EQ(transport_controller_->GetTransportParameters(kAudioMid1),
-              fake_params);
-    EXPECT_EQ(transport_controller_->GetTransportParameters(kVideoMid1),
-              fake_params);
-  }
-
-  auto offer = CreateSessionDescriptionForDatagramTransport(fake_params);
-  EXPECT_TRUE(SetDescription(SdpType::kOffer, offer.get()).ok());
-
-  EXPECT_EQ(transport_controller_->GetTransportParameters(kAudioMid1),
-            fake_params);
-  EXPECT_EQ(transport_controller_->GetTransportParameters(kVideoMid1),
-            fake_params);
-
-  auto answer = CreateSessionDescriptionForDatagramTransport(fake_params);
-  EXPECT_TRUE(SetDescription(SdpType::kAnswer, answer.get()).ok());
-
-  EXPECT_EQ(transport_controller_->GetTransportParameters(kAudioMid1),
-            fake_params);
-  EXPECT_EQ(transport_controller_->GetTransportParameters(kVideoMid1),
-            fake_params);
-
-  // Attempting to remove a datagram transport on a re-offer does not cause an
-  // error, but also does not remove the datagram transport.
-  auto reoffer = CreateSessionDescriptionForDatagramTransport(fake_params);
-  EXPECT_TRUE(SetDescription(SdpType::kOffer, reoffer.get()).ok());
-
-  EXPECT_EQ(transport_controller_->GetTransportParameters(kAudioMid1),
-            fake_params);
-  EXPECT_EQ(transport_controller_->GetTransportParameters(kVideoMid1),
-            fake_params);
-
-  auto reanswer = CreateSessionDescriptionForDatagramTransport(fake_params);
-  EXPECT_TRUE(SetDescription(SdpType::kAnswer, reanswer.get()).ok());
-
-  EXPECT_EQ(transport_controller_->GetTransportParameters(kAudioMid1),
-            fake_params);
-  EXPECT_EQ(transport_controller_->GetTransportParameters(kVideoMid1),
-            fake_params);
-}
-
 INSTANTIATE_TEST_SUITE_P(
     JsepTransportControllerDatagramTests,
     JsepTransportControllerDatagramTest,