diff --git a/CMakeLists.txt b/CMakeLists.txt
index 085ba0ca..282cc9be 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -43,9 +43,9 @@ endif()
 
 if (BUILD_TESTING AND CATCH_BUILD_TESTING AND NOT_SUBPROJECT)
     find_package(Python3 COMPONENTS Interpreter)
-#    if (NOT PYTHONINTERP_FOUND)
-#        message(FATAL_ERROR "Python not found, but required for tests")
-#    endif()
+    if (NOT Python_Interpreter_FOUND)
+        message(FATAL_ERROR "Python not found, but required for tests")
+    endif()
     add_subdirectory(projects)
 endif()
 
diff --git a/projects/CMakeLists.txt b/projects/CMakeLists.txt
index ee8f1013..c76a75a3 100644
--- a/projects/CMakeLists.txt
+++ b/projects/CMakeLists.txt
@@ -402,7 +402,7 @@ add_test(NAME FilteredSection-2 COMMAND $<TARGET_FILE:SelfTest> \#1394\ nested -
 set_tests_properties(FilteredSection-2 PROPERTIES FAIL_REGULAR_EXPRESSION "No tests ran")
 
 # AppVeyor has a Python 2.7 in path, but doesn't have .py files as autorunnable
-add_test(NAME ApprovalTests COMMAND ${PYTHON_EXECUTABLE} ${CATCH_DIR}/scripts/approvalTests.py $<TARGET_FILE:SelfTest>)
+add_test(NAME ApprovalTests COMMAND ${Python_EXECUTABLE} ${CATCH_DIR}/scripts/approvalTests.py $<TARGET_FILE:SelfTest>)
 set_tests_properties(ApprovalTests PROPERTIES FAIL_REGULAR_EXPRESSION "Results differed")
 
 add_test(NAME RegressionCheck-1670 COMMAND $<TARGET_FILE:SelfTest> "#1670 regression check" -c A -r compact)