diff --git a/tests/test_backend_fasttext.py b/tests/test_backend_fasttext.py
index f5334c73d..25d1ada8a 100644
--- a/tests/test_backend_fasttext.py
+++ b/tests/test_backend_fasttext.py
@@ -73,7 +73,7 @@ def test_fasttext_train_nodocuments(tmpdir, datadir, project):
     fasttext_type = annif.backend.get_backend("fasttext")
     fasttext = fasttext_type(
         backend_id='fasttext',
-        params={
+        config_params={
             'limit': 50,
             'dim': 100,
             'lr': 0.25,
diff --git a/tests/test_backend_pav.py b/tests/test_backend_pav.py
index 313d94703..d2810d4fe 100644
--- a/tests/test_backend_pav.py
+++ b/tests/test_backend_pav.py
@@ -44,7 +44,7 @@ def test_pav_train_nodocuments(tmpdir, datadir, project):
     pav_type = annif.backend.get_backend("pav")
     pav = pav_type(
         backend_id='pav',
-        params={'limit': 50, 'min-docs': 2, 'sources': 'dummy-fi'},
+        config_params={'limit': 50, 'min-docs': 2, 'sources': 'dummy-fi'},
         datadir=str(datadir))
 
     empty_file = tmpdir.ensure('empty.tsv')
diff --git a/tests/test_backend_vw_multi.py b/tests/test_backend_vw_multi.py
index 536a5c0ef..4d83268e3 100644
--- a/tests/test_backend_vw_multi.py
+++ b/tests/test_backend_vw_multi.py
@@ -77,7 +77,7 @@ def test_vw_multi_train_and_learn_nodocuments(datadir, tmpdir, project):
     vw_type = annif.backend.get_backend('vw_multi')
     vw = vw_type(
         backend_id='vw_multi',
-        params={
+        config_params={
             'chunksize': 4,
             'learning_rate': 0.5,
             'loss_function': 'hinge'},