diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2fdac6b..e34b936 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -201,25 +201,7 @@ jobs:
             llvm_os: ""
             llvm_ver: ""
             comment: "cppcheck"
-          - name: "COMMENT=ubsan B2_VARIANT=variant=debug B2_TOO Job 16"
-            buildtype: "boost"
-            packages: "g++-8"
-            packages_to_remove: ""
-            os: "ubuntu-20.04"
-            container: "ubuntu:16.04"
-            cxx: "g++-8"
-            sources: ""
-            llvm_os: ""
-            llvm_ver: ""
-            comment: "ubsan"
-            b2_variant: "variant=debug"
-            b2_toolset: "gcc-8"
-            b2_cxxstd: "03,11,14,17,2a"
-            b2_defines: "define=BOOST_NO_STRESS_TEST=1"
-            b2_cxxflags: "cxxflags=-fno-omit-frame-pointer cxxflags=-fsanitize=undefined cxxflags=-fno-sanitize-recover=all"
-            b2_linkflags: "linkflags=-fsanitize=undefined linkflags=-fuse-ld=gold"
-            ubsan_options: "print_stacktrace=1"
-          - name: "COMMENT=valgrind B2_TOOLSET=clang-6.0 B2_CXXS Job 17"
+          - name: "COMMENT=valgrind B2_TOOLSET=clang-6.0 B2_CXXS Job 16"
             buildtype: "b5847f804b-db180b7bd2"
             packages: "clang-6.0 libc6-dbg libc++-dev libstdc++-8-dev"
             packages_to_remove: ""