diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 9f1c259..b385a00 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -24,11 +24,15 @@ jobs:
 
   test-python-cli:
     runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 3
+      matrix:
+        python-version: [3.5, 3.6, 3.7]
     steps:
       - uses: actions/checkout@v1
       - uses: actions/setup-python@v1
         with:
-          python-version: '3.x'
+          python-version: ${{ matrix.python-version }}
       - name: test python cli
         run: |
           cd cli
@@ -44,7 +48,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-python@v1
         with:
-          python-version: '3.x'
+          python-version: "3.6"
       - name: test python backend
         run: |
           cd containers/backend
diff --git a/cli/lesspass/cli.py b/cli/lesspass/cli.py
index 569c873..e9d5ad1 100644
--- a/cli/lesspass/cli.py
+++ b/cli/lesspass/cli.py
@@ -79,7 +79,7 @@ def parse_args(args):
         "--copy",
         dest="clipboard",
         action="store_true",
-        help="copy to password to clipboard",
+        help="copy the password to clipboard",
     )
 
     lowercase_group = parser.add_mutually_exclusive_group()
diff --git a/cli/lesspass/clipboard.py b/cli/lesspass/clipboard.py
index 2d579bb..fcbe6a9 100644
--- a/cli/lesspass/clipboard.py
+++ b/cli/lesspass/clipboard.py
@@ -26,7 +26,7 @@ def get_system_copy_command():
 
 
 def _popen(args, **kwargs):
-    return subprocess.Popen(args, stdin=subprocess.PIPE, encoding="utf8")
+    return subprocess.Popen(args, stdin=subprocess.PIPE)
 
 
 commands = {