diff --git a/cmake/CuraTests.cmake b/cmake/CuraTests.cmake
index 251bec5781..0e62b84efa 100644
--- a/cmake/CuraTests.cmake
+++ b/cmake/CuraTests.cmake
@@ -4,18 +4,11 @@
 include(CTest)
 include(CMakeParseArguments)
 
-# FIXME: Remove the code for CMake <3.12 once we have switched over completely.
-# FindPython3 is a new module since CMake 3.12. It deprecates FindPythonInterp and FindPythonLibs. The FindPython3
-# module is copied from the CMake repository here so in CMake <3.12 we can still use it.
-if(${CMAKE_VERSION} VERSION_LESS 3.12)
-    # Use FindPythonInterp and FindPythonLibs for CMake <3.12
-    find_package(PythonInterp 3 REQUIRED)
+# FIXME: The new FindPython3 finds the system's Python3.6 reather than the Python3.5 that we built for Cura's environment.
+# So we're using the old method here, with FindPythonInterp for now.
+find_package(PythonInterp 3 REQUIRED)
 
-    set(Python3_EXECUTABLE ${PYTHON_EXECUTABLE})
-else()
-    # Use FindPython3 for CMake >=3.12
-    find_package(Python3 REQUIRED COMPONENTS Interpreter Development)
-endif()
+set(Python3_EXECUTABLE ${PYTHON_EXECUTABLE})
 
 add_custom_target(test-verbose COMMAND ${CMAKE_CTEST_COMMAND} --verbose)