diff --git a/examples/adhoc-layout/tox.ini b/examples/adhoc-layout/tox.ini
index a2472d03..6e299f24 100644
--- a/examples/adhoc-layout/tox.ini
+++ b/examples/adhoc-layout/tox.ini
@@ -1,12 +1,14 @@
 [tox]
-envlist = clean,py27,py38,report
+envlist = py27,py38,report
 
 [tool:pytest]
 addopts =
     --cov-report=term-missing
 
 [testenv]
-commands = pytest --cov --cov-append --cov-config={toxinidir}/.coveragerc {posargs:-vv}
+setenv =
+    py{27,38}: COVERAGE_FILE = .coverage.{envname}
+commands = pytest --cov --cov-config={toxinidir}/.coveragerc {posargs:-vv}
 deps =
     pytest
     coverage
@@ -17,7 +19,6 @@ deps =
     ../..
 
 depends =
-    {py27,py38}: clean
     report: py27,py38
 
 # note that this is necessary to prevent the tests importing the code from your badly laid project
@@ -27,10 +28,6 @@ changedir = tests
 skip_install = true
 deps = coverage
 commands =
+    coverage combine
     coverage html
     coverage report --fail-under=100
-
-[testenv:clean]
-skip_install = true
-deps = coverage
-commands = coverage erase
diff --git a/examples/src-layout/tox.ini b/examples/src-layout/tox.ini
index 054b4b80..6be8e73d 100644
--- a/examples/src-layout/tox.ini
+++ b/examples/src-layout/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = clean,py27,py38,report
+envlist = py27,py38,report
 
 [tool:pytest]
 testpaths = tests
@@ -7,7 +7,9 @@ addopts =
     --cov-report=term-missing
 
 [testenv]
-commands = pytest --cov --cov-append {posargs:-vv}
+setenv =
+    py{27,38}: COVERAGE_FILE = .coverage.{envname}
+commands = pytest --cov {posargs:-vv}
 deps =
     pytest
     coverage
@@ -18,17 +20,12 @@ deps =
     ../..
 
 depends =
-    {py27,py38}: clean
     report: py27,py38
 
 [testenv:report]
 skip_install = true
 deps = coverage
 commands =
+    coverage combine
     coverage html
     coverage report --fail-under=100
-
-[testenv:clean]
-skip_install = true
-deps = coverage
-commands = coverage erase