diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index abbf8326..1c21c7fa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -68,6 +68,10 @@ jobs:
         shell: bash
         run: |
           cd build
+          # On ubuntu we need to modify memlock limit to allow tests to run
+          if [[ "${{ matrix.os }}" == "ubuntu-latest" ]]; then
+            sudo prlimit --memlock=unlimited --pid=$$
+          fi
           # On macOS, sudo is required to run tests due to LAN access permissions
           if [[ "${{ matrix.os }}" == "macos-latest" ]]; then
             sudo ctest -C ${{ matrix.build_type }} --output-on-failure
diff --git a/tests/universal/network/pub_sub.cxx b/tests/universal/network/pub_sub.cxx
index 6e71d86b..35838fbe 100644
--- a/tests/universal/network/pub_sub.cxx
+++ b/tests/universal/network/pub_sub.cxx
@@ -38,7 +38,7 @@ class SHMAllocator {
         const auto len = strlen(data);
         auto alloc_result = provider.alloc_gc_defrag_blocking(len, AllocAlignment({0}));
         ZShmMut&& buf = std::get<ZShmMut>(std::move(alloc_result));
-        memcpy(buf.data(), data, len + 1);
+        memcpy(buf.data(), data, len);
         return Bytes(std::move(buf));
     }
 };