diff --git a/test/test_0_basic.py b/test/test_0_basic.py
index de663848..5bf16822 100644
--- a/test/test_0_basic.py
+++ b/test/test_0_basic.py
@@ -13,8 +13,8 @@ basic_project = CTemplateProject(
 )
 
 
-def test(tmpdir):
-    project_dir = str(tmpdir)
+def test(tmp_path):
+    project_dir = tmp_path / 'project'
     basic_project.generate(project_dir)
 
     # build the wheels
@@ -25,8 +25,8 @@ def test(tmpdir):
     assert set(actual_wheels) == set(expected_wheels)
 
 
-def test_build_identifiers(tmpdir):
-    project_dir = str(tmpdir)
+def test_build_identifiers(tmp_path):
+    project_dir = tmp_path / 'project'
     basic_project.generate(project_dir)
 
     # check that the number of expected wheels matches the number of build
diff --git a/test/test_before_build.py b/test/test_before_build.py
index db81bb6b..b1715238 100644
--- a/test/test_before_build.py
+++ b/test/test_before_build.py
@@ -28,8 +28,8 @@ project_with_before_build_asserts = CTemplateProject(
 )
 
 
-def test(tmpdir):
-    project_dir = str(tmpdir)
+def test(tmp_path):
+    project_dir = tmp_path / 'project'
     project_with_before_build_asserts.generate(project_dir)
 
     # build the wheels
diff --git a/test/test_before_test.py b/test/test_before_test.py
index 46b3dce3..988f7b33 100644
--- a/test/test_before_test.py
+++ b/test/test_before_test.py
@@ -34,8 +34,8 @@ class TestBeforeTest(TestCase):
 '''
 
 
-def test(tmpdir):
-    project_dir = str(tmpdir)
+def test(tmp_path):
+    project_dir = tmp_path / 'project'
     before_test_project.generate(project_dir)
 
     # build the wheels
diff --git a/test/test_build_skip.py b/test/test_build_skip.py
index f6cb123a..30bba181 100644
--- a/test/test_build_skip.py
+++ b/test/test_build_skip.py
@@ -14,8 +14,8 @@ project_with_skip_asserts = CTemplateProject(
 )
 
 
-def test(tmpdir):
-    project_dir = str(tmpdir)
+def test(tmp_path):
+    project_dir = tmp_path / 'project'
     project_with_skip_asserts.generate(project_dir)
 
     # build the wheels
diff --git a/test/test_cpp_standards.py b/test/test_cpp_standards.py
index d5c5708a..c00c6791 100644
--- a/test/test_cpp_standards.py
+++ b/test/test_cpp_standards.py
@@ -73,9 +73,9 @@ MOD_INIT(spam)
 ''')
 
 
-def test_cpp11(tmpdir):
+def test_cpp11(tmp_path):
     # This test checks that the C++11 standard is supported
-    project_dir = str(tmpdir)
+    project_dir = tmp_path / 'project'
 
     project = cpp_template_project.copy()
     extra_compile_args = ['/std:c++11'] if utils.platform == 'windows' else ['-std=c++11']
@@ -93,9 +93,9 @@ def test_cpp11(tmpdir):
     assert set(actual_wheels) == set(expected_wheels)
 
 
-def test_cpp14(tmpdir):
+def test_cpp14(tmp_path):
     # This test checks that the C++14 standard is supported
-    project_dir = str(tmpdir)
+    project_dir = tmp_path / 'project'
 
     project = cpp_template_project.copy()
     extra_compile_args = ['/std:c++14'] if utils.platform == 'windows' else ['-std=c++14']
@@ -117,9 +117,9 @@ def test_cpp14(tmpdir):
     assert set(actual_wheels) == set(expected_wheels)
 
 
-def test_cpp17(tmpdir):
+def test_cpp17(tmp_path):
     # This test checks that the C++17 standard is supported
-    project_dir = str(tmpdir)
+    project_dir = tmp_path / 'project'
 
     project = cpp_template_project.copy()
     if utils.platform == 'windows':
diff --git a/test/test_dependency_versions.py b/test/test_dependency_versions.py
index c4f899ae..c290c971 100644
--- a/test/test_dependency_versions.py
+++ b/test/test_dependency_versions.py
@@ -51,11 +51,11 @@ def get_versions_from_constraint_file(constraint_file):
 
 
 @pytest.mark.parametrize('python_version', ['2.7', '3.5', '3.8'])
-def test_pinned_versions(tmpdir, python_version):
+def test_pinned_versions(tmp_path, python_version):
     if utils.platform == 'linux':
         pytest.skip('linux doesn\'t pin individual tool versions, it pins manylinux images instead')
 
-    project_dir = str(tmpdir)
+    project_dir = tmp_path / 'project'
     project_with_expected_version_checks.generate(project_dir)
 
     build_environment = {}
@@ -108,7 +108,7 @@ def test_dependency_constraints_file(tmp_path, python_version):
     if utils.platform == 'linux':
         pytest.skip('linux doesn\'t pin individual tool versions, it pins manylinux images instead')
 
-    project_dir = str(tmp_path / 'project')
+    project_dir = tmp_path / 'project'
     project_with_expected_version_checks.generate(project_dir)
 
     tool_versions = {
diff --git a/test/test_docker_images.py b/test/test_docker_images.py
index c0254408..725779f2 100644
--- a/test/test_docker_images.py
+++ b/test/test_docker_images.py
@@ -20,13 +20,13 @@ dockcross_only_project = CTemplateProject(
 )
 
 
-def test(tmpdir):
+def test(tmp_path):
     if utils.platform != 'linux':
         pytest.skip('the test is only relevant to the linux build')
     if platform.machine() not in ['x86_64', 'i686']:
         pytest.skip('this test is currently only possible on x86_64/i686 due to availability of alternative images')
 
-    project_dir = str(tmpdir)
+    project_dir = tmp_path / 'project'
     dockcross_only_project.generate(project_dir)
 
     actual_wheels = utils.cibuildwheel_run(project_dir, add_env={
diff --git a/test/test_environment.py b/test/test_environment.py
index 5e4b9ee6..0d9eb103 100644
--- a/test/test_environment.py
+++ b/test/test_environment.py
@@ -27,8 +27,8 @@ project_with_environment_asserts = CTemplateProject(
 )
 
 
-def test(tmpdir):
-    project_dir = str(tmpdir)
+def test(tmp_path):
+    project_dir = tmp_path / 'project'
     project_with_environment_asserts.generate(project_dir)
 
     # write some information into the CIBW_ENVIRONMENT, for expansion and
@@ -45,8 +45,8 @@ def test(tmpdir):
 
 
 def test_overridden_path(tmp_path):
-    project_dir = str(tmp_path / 'project')
-    output_dir = str(tmp_path / 'output')
+    project_dir = tmp_path / 'project'
+    output_dir = tmp_path / 'output'
     CTemplateProject().generate(project_dir)
 
     # mess up PATH, somehow
diff --git a/test/test_manylinuxXXXX_only.py b/test/test_manylinuxXXXX_only.py
index 25aa6255..e3753ea9 100644
--- a/test/test_manylinuxXXXX_only.py
+++ b/test/test_manylinuxXXXX_only.py
@@ -33,14 +33,14 @@ project_with_manylinux_symbols = CTemplateProject(
 
 
 @pytest.mark.parametrize('manylinux_image', ['manylinux1', 'manylinux2010', 'manylinux2014'])
-def test(manylinux_image, tmpdir):
+def test(manylinux_image, tmp_path):
     if utils.platform != 'linux':
         pytest.skip('the docker test is only relevant to the linux build')
     elif platform.machine() not in ['x86_64', 'i686']:
         if manylinux_image in ['manylinux1', 'manylinux2010']:
             pytest.skip("manylinux1 and 2010 doesn't exist for non-x86 architectures")
 
-    project_dir = str(tmpdir)
+    project_dir = tmp_path / 'project'
     project_with_manylinux_symbols.generate(project_dir)
 
     # build the wheels
diff --git a/test/test_ssl.py b/test/test_ssl.py
index ae42fe77..eddb4074 100644
--- a/test/test_ssl.py
+++ b/test/test_ssl.py
@@ -22,10 +22,10 @@ project_with_ssl_tests = CTemplateProject(
 )
 
 
-def test(tmpdir):
+def test(tmp_path):
     # this test checks that SSL is working in the build environment using
     # some checks in setup.py.
-    project_dir = str(tmpdir)
+    project_dir = tmp_path / 'project'
     project_with_ssl_tests.generate(project_dir)
 
     utils.cibuildwheel_run(project_dir)
diff --git a/test/test_subdir_package.py b/test/test_subdir_package.py
index 45a283aa..ebfebcf2 100644
--- a/test/test_subdir_package.py
+++ b/test/test_subdir_package.py
@@ -26,8 +26,8 @@ print('before_build.py executed!')
 '''
 
 
-def test(capfd, tmpdir):
-    project_dir = str(tmpdir)
+def test(capfd, tmp_path):
+    project_dir = tmp_path / 'project'
     subdir_package_project.generate(project_dir)
 
     package_dir = os.path.join(project_dir, 'src', 'spam')
diff --git a/test/test_testing.py b/test/test_testing.py
index 37f1009f..ed60fded 100644
--- a/test/test_testing.py
+++ b/test/test_testing.py
@@ -25,8 +25,8 @@ class TestSpam(TestCase):
 '''
 
 
-def test(tmpdir):
-    project_dir = str(tmpdir)
+def test(tmp_path):
+    project_dir = tmp_path / 'project'
     project_with_a_test.generate(project_dir)
 
     # build and test the wheels
@@ -43,8 +43,8 @@ def test(tmpdir):
     assert set(actual_wheels) == set(expected_wheels)
 
 
-def test_extras_require(tmpdir):
-    project_dir = str(tmpdir)
+def test_extras_require(tmp_path):
+    project_dir = tmp_path / 'project'
     project_with_a_test.generate(project_dir)
 
     # build and test the wheels
@@ -63,8 +63,8 @@ def test_extras_require(tmpdir):
 
 def test_failing_test(tmp_path):
     """Ensure a failing test causes cibuildwheel to error out and exit"""
-    project_dir = str(tmp_path / 'project')
-    output_dir = str(tmp_path / 'output')
+    project_dir = tmp_path / 'project'
+    output_dir = tmp_path / 'output'
     project_with_a_test.generate(project_dir)
 
     with pytest.raises(subprocess.CalledProcessError):