diff --git a/.github/workflows/pr-check.yml b/.github/workflows/pr-check.yml
index 4f297694..10074134 100644
--- a/.github/workflows/pr-check.yml
+++ b/.github/workflows/pr-check.yml
@@ -96,7 +96,7 @@ jobs:
           # Apparently, patching os.readlink in unit tests interferes with
           # finding some source files, but our source shouldn't be affected, so
           # ignore these errors.
-          coverage json --ignore-errors -o coverage.json
+          coverage json -o coverage.json
 
       - name: Upload coverage information
         if: ${{ always() && github.event.repository.owner.login == 'alisw' }}
diff --git a/tox.ini b/tox.ini
index ed710071..ee2e406f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -76,8 +76,6 @@ commands =
 
     coverage run --source={toxinidir} -a {toxinidir}/aliBuild version
 
-    coverage run --source={toxinidir} -a -m unittest discover {toxinidir}/tests
-
     git clone -b O2-v1.3.0 --depth 1 https://github.com/alisw/alidist
 
     coverage run --source={toxinidir} -a {toxinidir}/aliBuild -a {env:ARCHITECTURE} -z test-init init zlib
@@ -108,6 +106,7 @@ commands =
     coverage run --source={toxinidir} -a {toxinidir}/aliBuild init zlib
     touch zlib/foo
     coverage run --source={toxinidir} -a {toxinidir}/aliBuild -a {env:ARCHITECTURE} --no-system --disable GCC-Toolchain build zlib
+    coverage run --source={toxinidir} -a -m unittest discover {toxinidir}/tests
 
 [coverage:run]
 branch = True