diff --git a/ci/docker/ubuntu-18.04-gnu-cpp.dockerfile b/ci/docker/ubuntu-18.04-gnu-cpp.dockerfile
index 0ee2075daa..2e586fb624 100644
--- a/ci/docker/ubuntu-18.04-gnu-cpp.dockerfile
+++ b/ci/docker/ubuntu-18.04-gnu-cpp.dockerfile
@@ -117,4 +117,6 @@ ENV VT_LB_ENABLED=${VT_LB_ENABLED} \
 RUN /vt/ci/build_cpp.sh /vt /build
 
 FROM build as test
+ENV LSAN_OPTIONS=suppressions=/vt/tests/knowns_leaks.supp
+
 RUN /vt/ci/test_cpp.sh /vt /build
diff --git a/tests/knowns_leaks.supp b/tests/knowns_leaks.supp
new file mode 100644
index 0000000000..b121627013
--- /dev/null
+++ b/tests/knowns_leaks.supp
@@ -0,0 +1 @@
+leak:MPIDI_CH3U_Receive_data_unexpected