diff --git a/tools/dockerfile/grpc_interop_csharp/build_interop.sh b/tools/dockerfile/grpc_interop_csharp/build_interop.sh
index e87fe2f692875826e18d6ef1ec613d0dce349dad..5ad525f41c5af2998d226d395e17a8ada930b2e7 100755
--- a/tools/dockerfile/grpc_interop_csharp/build_interop.sh
+++ b/tools/dockerfile/grpc_interop_csharp/build_interop.sh
@@ -39,8 +39,6 @@ cp -r /var/local/jenkins/service_account $HOME || true
 
 cd /var/local/git/grpc
 
-make install-certs
-
 # build C# interop client & server
 make CONFIG=dbg grpc_csharp_ext
 (cd src/csharp && mono /var/local/NuGet.exe restore Grpc.sln)