diff --git a/testing/resources/ruby_1_9_3_hooks_repo/lib/.gitignore b/testing/resources/ruby_1_9_3_hooks_repo/lib/.gitignore
new file mode 100644
index 00000000..e69de29b
diff --git a/testing/resources/ruby_hooks_repo/lib/.gitignore b/testing/resources/ruby_hooks_repo/lib/.gitignore
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/commands/install_uninstall_test.py b/tests/commands/install_uninstall_test.py
index ae9dddfb..09779350 100644
--- a/tests/commands/install_uninstall_test.py
+++ b/tests/commands/install_uninstall_test.py
@@ -139,7 +139,8 @@ def test_environment_not_sourced(tmpdir_factory):
 
         ret, stdout, stderr = local['git'].run(
             ['commit', '--allow-empty', '-m', 'foo'],
-            env={},
+            # XXX: 'HOME' makes this test pass on OSX
+            env={'HOME': os.environ['HOME']},
             retcode=None,
         )
         assert ret == 1
diff --git a/tests/repository_test.py b/tests/repository_test.py
index 55950641..451054d9 100644
--- a/tests/repository_test.py
+++ b/tests/repository_test.py
@@ -55,7 +55,7 @@ def test_versioned_python_hook(tmpdir_factory, store):
 def test_run_a_node_hook(tmpdir_factory, store):
     _test_hook_repo(
         tmpdir_factory, store, 'node_hooks_repo',
-        'foo', [], 'Hello World\n',
+        'foo', ['/dev/null'], 'Hello World\n',
     )
 
 
@@ -73,7 +73,7 @@ def test_run_versioned_node_hook(tmpdir_factory, store):
 def test_run_a_ruby_hook(tmpdir_factory, store):
     _test_hook_repo(
         tmpdir_factory, store, 'ruby_hooks_repo',
-        'ruby_hook', [], 'Hello world from a ruby hook\n',
+        'ruby_hook', ['/dev/null'], 'Hello world from a ruby hook\n',
     )
 
 
@@ -82,7 +82,9 @@ def test_run_a_ruby_hook(tmpdir_factory, store):
 def test_run_versioned_ruby_hook(tmpdir_factory, store):
     _test_hook_repo(
         tmpdir_factory, store, 'ruby_1_9_3_hooks_repo',
-        'ruby_hook', [], '1.9.3\n484\nHello world from a ruby hook\n',
+        'ruby_hook',
+        ['/dev/null'],
+        '1.9.3\n484\nHello world from a ruby hook\n',
     )
 
 
@@ -90,7 +92,7 @@ def test_run_versioned_ruby_hook(tmpdir_factory, store):
 def test_system_hook_with_spaces(tmpdir_factory, store):
     _test_hook_repo(
         tmpdir_factory, store, 'system_hook_with_spaces_repo',
-        'system-hook-with-spaces', [], 'Hello World\n',
+        'system-hook-with-spaces', ['/dev/null'], 'Hello World\n',
     )
 
 
@@ -180,7 +182,7 @@ def test_cwd_of_hook(tmpdir_factory, store):
     with local.cwd(path):
         _test_hook_repo(
             tmpdir_factory, store, 'prints_cwd_repo',
-            'prints_cwd', [], path + '\n',
+            'prints_cwd', ['-L'], path + '\n',
         )
 
 
@@ -284,7 +286,7 @@ def test_tags_on_repositories(in_tmpdir, tmpdir_factory, store):
     repo_1 = Repository.create(
         make_config_from_repo(git_dir_1, sha=tag), store,
     )
-    ret = repo_1.run_hook('prints_cwd', [])
+    ret = repo_1.run_hook('prints_cwd', ['-L'])
     assert ret[0] == 0
     assert ret[1].strip() == in_tmpdir