Try to fix a test under MacOS.

tests/run/scanner_trace.srctree

@@ -9,16 +9,26 @@ import Cython.Compiler.Scanning
 
 Cython.Compiler.Scanning.trace_scanner = 1
 
-setup(
-    ext_modules = cythonize("*.pyx")
-)
+setup(ext_modules=cythonize("*.pyx"))
+
+try:
+    from importlib.util import spec_from_file_location, module_from_spec
+except ImportError:
+    # Py<=3.4
+    # Try to import from the current directory.
+    import os, sys
+    sys.path.insert(0, os.getcwd())
+    import simple
+else:
+    # Py3.5+
+    import glob
+    ext_files = glob.glob("simple*.so") + glob.glob("simple*.pyd")
+    assert ext_files
+    spec = spec_from_file_location('simple', ext_files[0])
+    simple = module_from_spec(spec)
+    spec.loader.exec_module(simple)
 
-# Make sure we can import from the current directory.
-import os
-import sys
-sys.path.insert(0, os.getcwd())
 
-import simple
 assert simple.test() == 123