diff --git a/test/integration/multiplexed_integration_test.cc b/test/integration/multiplexed_integration_test.cc
index 98f92eb686d6b..fbde3f043ace9 100644
--- a/test/integration/multiplexed_integration_test.cc
+++ b/test/integration/multiplexed_integration_test.cc
@@ -1920,9 +1920,8 @@ TEST_P(MultiplexedIntegrationTest, OnLocalReply) {
   }
 }
 
-// Disabled for coverage temporarily see #18881
-#if !defined(ENVOY_CONFIG_COVERAGE)
 TEST_P(MultiplexedIntegrationTest, InvalidTrailers) {
+  autonomous_allow_incomplete_streams_ = true;
   useAccessLog("%RESPONSE_CODE_DETAILS%");
   autonomous_upstream_ = true;
   initialize();
@@ -1941,7 +1940,6 @@ TEST_P(MultiplexedIntegrationTest, InvalidTrailers) {
   // http2.invalid.header.field or http3.invalid_header_field
   EXPECT_THAT(waitForAccessLog(access_log_name_), HasSubstr("invalid"));
 }
-#endif
 
 TEST_P(MultiplexedIntegrationTest, InconsistentContentLength) {
   useAccessLog("%RESPONSE_CODE_DETAILS%");