fixed pytest warnings

Signed-off-by: Jürgen Eckel <juergen@riddleandcode.com>

pytest.ini

@@ -2,4 +2,16 @@
 testpaths = tests/
 norecursedirs = .* *.egg *.egg-info env* devenv* docs
 addopts = -m "not abci"
-looponfailroots = planetmint tests
+#looponfail
+#root = planetmint tests
+markers =
+    bdb: bdb
+    skip: skip
+    abci: abci
+    usefixture('inputs'): unclear
+    userfixtures('utxoset'): unclear
+    language: lanuage
+    web: web
+    tendermint: tendermint
+    execute: execute
+

tests/conftest.py

@@ -419,7 +419,7 @@ def abci_http(_setup_database, _configure_planetmint, abci_server,
     return False
 
 
-@pytest.yield_fixture(scope='session')
+@pytest.fixture(scope='session')
 def event_loop():
     import asyncio