diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 963935b..80e3080 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,8 +35,32 @@ jobs:
       - uses: julia-actions/cache@v2
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
+        if: matrix.version != 'pre'
         with:
           depwarn: error
+      - name: Run tests (pre, verbose)
+        if: matrix.version == 'pre'
+        id: pre_test
+        run: |
+          julia --depwarn=error --project -e 'using Pkg; Pkg.test()' 2>&1 | tee /tmp/test-output.txt || true
+          echo '```' >> $GITHUB_STEP_SUMMARY
+          tail -100 /tmp/test-output.txt >> $GITHUB_STEP_SUMMARY
+          echo '```' >> $GITHUB_STEP_SUMMARY
+          grep -q "Testing DynamicPolynomials tests passed" /tmp/test-output.txt
+      - name: Post test output as PR comment
+        if: failure() && matrix.version == 'pre' && github.event_name == 'pull_request'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require('fs');
+            const output = fs.readFileSync('/tmp/test-output.txt', 'utf8');
+            const last200 = output.split('\n').slice(-200).join('\n');
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              body: `### Julia pre test failure\n\`\`\`\n${last200}\n\`\`\``
+            });
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v4
         with:
diff --git a/test/runtests.jl b/test/runtests.jl
index 36f20ea..56edbeb 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,7 +1,12 @@
+@info "Julia version: $(VERSION)"
+@info "depwarn setting: $(Base.JLOptions().depwarn)"
 using DynamicPolynomials
+@info "DynamicPolynomials loaded"
 using MultivariatePolynomials
+@info "MultivariatePolynomials loaded"
 using Test
 using LinearAlgebra
+@info "All packages loaded, starting tests"
 
 function alloc_test_lt(f, n)
     f() # compile