diff --git a/appveyor.yml b/appveyor.yml
index 5498d63f..13a6b425 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,8 +1,3 @@
-image:
-    - Visual Studio 2019
-    - Ubuntu
-    - macOS
-
 shallow_clone: true
 
 platform:
@@ -12,13 +7,25 @@ environment:
     matrix:
         - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
           MINICONDA_DIRNAME: C:\Miniconda37-x64
+          PYTHON_VERSION: 3.7
         - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
           MINICONDA_DIRNAME: C:\Miniconda38-x64
+          PYTHON_VERSION: 3.8
         - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
           MINICONDA_DIRNAME: C:\Miniconda39-x64
-        - PYTHON_VERSION: 3.7
-        - PYTHON_VERSION: 3.8
-        - PYTHON_VERSION: 3.9
+          PYTHON_VERSION: 3.9
+        - APPVEYOR_BUILD_WORKER_IMAGE: Ubuntu
+          PYTHON_VERSION: 3.7
+        - APPVEYOR_BUILD_WORKER_IMAGE: Ubuntu
+          PYTHON_VERSION: 3.8
+        - APPVEYOR_BUILD_WORKER_IMAGE: Ubuntu
+          PYTHON_VERSION: 3.9
+        - APPVEYOR_BUILD_WORKER_IMAGE: macOS
+          PYTHON_VERSION: 3.7
+        - APPVEYOR_BUILD_WORKER_IMAGE: macOS
+          PYTHON_VERSION: 3.8
+        - APPVEYOR_BUILD_WORKER_IMAGE: macOS
+          PYTHON_VERSION: 3.9
 
     ANACONDA_TOKEN:
         secure: $(anaconda_token)