diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7dbbf240d4d..66d95333887 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -132,6 +132,7 @@ jobs:
           PYTHON: ''
           TRIXI_TEST: ${{ matrix.trixi_test }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # for authenticated downloads without strict rate limits
+          JULIA_DEBUG: "loading" # for debugging loading issues in CI
       - uses: julia-actions/julia-processcoverage@v1
         if: ${{ !cancelled() }}
         with:
diff --git a/test/test_trixi.jl b/test/test_trixi.jl
index b636841d0ff..6e6e5fdab52 100644
--- a/test/test_trixi.jl
+++ b/test/test_trixi.jl
@@ -13,7 +13,9 @@ macro test_trixi_include(expr, args...)
         r"┌ Warning: Problem status ALMOST_OPTIMAL; solution may be inaccurate.\n└ @ Convex ~/.julia/packages/Convex/.*\n",
         # Warnings for higher-precision floating data types
         r"┌ Warning: #= /home/runner/work/Trixi.jl/Trixi.jl/src/solvers/dgsem/interpolation.jl:118 =#:\n│ `LoopVectorization.check_args` on your inputs failed; running fallback `@inbounds @fastmath` loop instead.\n│ Use `warn_check_args=false`, e.g. `@turbo warn_check_args=false ...`, to disable this warning.\n└ @ Trixi ~/.julia/packages/LoopVectorization/.*\n",
-        r"┌ Warning: #= /home/runner/work/Trixi.jl/Trixi.jl/src/solvers/dgsem/interpolation.jl:136 =#:\n│ `LoopVectorization.check_args` on your inputs failed; running fallback `@inbounds @fastmath` loop instead.\n│ Use `warn_check_args=false`, e.g. `@turbo warn_check_args=false ...`, to disable this warning.\n└ @ Trixi ~/.julia/packages/LoopVectorization/.*\n"
+r"┌ Warning: #= /home/runner/work/Trixi.jl/Trixi.jl/src/solvers/dgsem/interpolation.jl:136 =#:\n│ `LoopVectorization.check_args` on your inputs failed; running fallback `@inbounds @fastmath` loop instead.\n│ Use `warn_check_args=false`, e.g. `@turbo warn_check_args=false ...`, to disable this warning.\n└ @ Trixi ~/.julia/packages/LoopVectorization/.*\n",
+        # Debug messages
+        r"┌ Debug: .*\n└ @ Base loading.jl:.*\n",
     ]
     # if `maxiters` is set in tests, it is usually set to a small number to
     # run only a few steps - ignore possible warnings coming from that