diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9b9735c..040133a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,9 +21,15 @@ jobs:
             cxxstd: "03,11"
             os: ubuntu-16.04
             install: g++-4.8
+            cxxflags: "cxxflags=--coverage"
+            linkflags: "linkflags=--coverage"
+            gcov_tool: "gcov-4.8"
           - toolset: gcc-7
             cxxstd: "03,11,14,17"
             os: ubuntu-18.04
+            cxxflags: "cxxflags=--coverage"
+            linkflags: "linkflags=--coverage"
+            gcov_tool: "gcov-7"
           - toolset: gcc-9
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-18.04