diff --git a/.appveyor/packages.yml b/.appveyor/packages.yml
index 740b5e0e..4d4cb767 100644
--- a/.appveyor/packages.yml
+++ b/.appveyor/packages.yml
@@ -43,9 +43,6 @@ environment:
   # Select according to the service enabled
   POSTGRES_DIR: C:\Program Files\PostgreSQL\9.6\
 
-  # The python used in the build process, not the one packages are built for
-  PYEXE: C:\Python36\python.exe
-
 matrix:
   fast_finish: false
 
@@ -64,23 +61,23 @@ cache:
 # Repository gets cloned, Cache is restored
 
 install:
-  - "%PYEXE% scripts\\build\\appveyor.py install"
+  - "py scripts\\build\\appveyor.py install"
 
 # PostgreSQL server starts now
 
 build: "off"
 
 build_script:
-  - "%PYEXE% scripts\\build\\appveyor.py build_script"
+  - "py scripts\\build\\appveyor.py build_script"
 
 after_build:
-  - "%PYEXE% scripts\\build\\appveyor.py after_build"
+  - "py scripts\\build\\appveyor.py after_build"
 
 before_test:
-  - "%PYEXE% scripts\\build\\appveyor.py before_test"
+  - "py scripts\\build\\appveyor.py before_test"
 
 test_script:
-  - "%PYEXE% scripts\\build\\appveyor.py test_script"
+  - "py scripts\\build\\appveyor.py test_script"
 
 artifacts:
   - path: dist\psycopg2-*\*.whl
diff --git a/.appveyor/tests.yml b/.appveyor/tests.yml
index 0cf91dda..a904b758 100644
--- a/.appveyor/tests.yml
+++ b/.appveyor/tests.yml
@@ -38,9 +38,6 @@ environment:
   # Select according to the service enabled
   POSTGRES_DIR: C:\Program Files\PostgreSQL\9.6\
 
-  # The python used in the build process, not the one packages are built for
-  PYEXE: C:\Python36\python.exe
-
 matrix:
   fast_finish: false
 
@@ -59,23 +56,23 @@ cache:
 # Repository gets cloned, Cache is restored
 
 install:
-  - "%PYEXE% scripts\\build\\appveyor.py install"
+  - py scripts\\build\\appveyor.py install"
 
 # PostgreSQL server starts now
 
 build: "off"
 
 build_script:
-  - "%PYEXE% scripts\\build\\appveyor.py build_script"
+  - py scripts\\build\\appveyor.py build_script"
 
 after_build:
-  - "%PYEXE% scripts\\build\\appveyor.py after_build"
+  - py scripts\\build\\appveyor.py after_build"
 
 before_test:
-  - "%PYEXE% scripts\\build\\appveyor.py before_test"
+  - py scripts\\build\\appveyor.py before_test"
 
 test_script:
-  - "%PYEXE% scripts\\build\\appveyor.py test_script"
+  - py scripts\\build\\appveyor.py test_script"
 
 
 # vim: set ts=4 sts=4 sw=4: