diff --git a/ci/azure-macos-35.yml b/ci/azure-macos-35.yaml
similarity index 100%
rename from ci/azure-macos-35.yml
rename to ci/azure-macos-35.yaml
diff --git a/ci/azure/macos.yml b/ci/azure/macos.yml
index 5bf8d18d6cbb9..9bfaef04ea2fa 100644
--- a/ci/azure/macos.yml
+++ b/ci/azure/macos.yml
@@ -10,7 +10,7 @@ jobs:
     maxParallel: 11
     matrix:
       py35_np_110:
-        ENV_FILE: ci/azure-macos-35.yml
+        ENV_FILE: ci/azure-macos-35.yaml
         CONDA_PY: "35"
         CONDA_ENV: pandas
         TEST_ARGS: "--skip-slow --skip-network"
diff --git a/ci/azure/windows-py27.yml b/ci/azure/windows-py27.yml
index 3e92c96263930..10251bc03b8dc 100644
--- a/ci/azure/windows-py27.yml
+++ b/ci/azure/windows-py27.yml
@@ -10,7 +10,7 @@ jobs:
     maxParallel: 11
     matrix:
       py36_np14:
-        ENV_FILE: ci/azure-windows-27.yml
+        ENV_FILE: ci/azure-windows-27.yaml
         CONDA_PY: "27"
         CONDA_ENV: pandas
 
diff --git a/ci/azure/windows.yml b/ci/azure/windows.yml
index 2ab8c6f320188..fe6c9c933d474 100644
--- a/ci/azure/windows.yml
+++ b/ci/azure/windows.yml
@@ -10,7 +10,7 @@ jobs:
     maxParallel: 11
     matrix:
       py36_np14:
-        ENV_FILE: ci/azure-windows-36.yml
+        ENV_FILE: ci/azure-windows-36.yaml
         CONDA_PY: "36"
         CONDA_ENV: pandas