Update conftest

tests/conftest.py

@@ -1,6 +1,14 @@
 import pytest
 import asyncio
-import platform
+
+
+def import_uvloop():
+    try:
+        import uvloop
+    except ImportError:
+        return None
+    else:
+        return uvloop
 
 
 @pytest.fixture(
@@ -13,14 +21,16 @@ def event_loop_policy(request):
     if request.param == "default":
         return asyncio.DefaultEventLoopPolicy()
     elif request.param == "uvloop":
-        if platform.python_implementation() == "PyPy":
-            pytest.skip("Skip uvloop tests on PyPy.")
-        import uvloop
-
+        uvloop = import_uvloop()
+        if uvloop is None:
+            pytest.skip("uvloop is not installed")
         return uvloop.EventLoopPolicy()
     return request.param
 
 
 @pytest.fixture
 def is_uvloop(event_loop_policy):
-    return not isinstance(event_loop_policy, asyncio.DefaultEventLoopPolicy)
+    uvloop = import_uvloop()
+    if uvloop is None:
+        return False
+    return isinstance(event_loop_policy, uvloop.EventLoopPolicy)