diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 50ab7462a..bec58f700 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -5,11 +5,10 @@ jobs:
     runs-on: ${{ matrix.platform }}
     strategy:
       matrix:
-        platform: [ windows-latest, ubuntu-latest ]
+        platform: [ ubuntu-latest ]
     env:
       NOSE_SHOW_SKIPPED: 1
       PY_COLOR: 1
-      PYTHONIOENCODING: utf-8
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python 2.7
@@ -40,12 +39,11 @@ jobs:
     runs-on: ${{ matrix.platform }}
     strategy:
       matrix:
-        platform: [ windows-latest, ubuntu-latest ]
+        platform: [ ubuntu-latest ]
         python-version: [ 5, 6, 7, 8 ]
     env:
       NOSE_SHOW_SKIPPED: 1
       PY_COLOR: 1
-      PYTHONIOENCODING: utf-8
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python 3.${{ matrix.python-version }}