diff --git a/.appveyor.yml b/.appveyor.yml
index b57a127e9..a1d257cdd 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -61,7 +61,7 @@ before_test:
   - pip install -r test-requirements.txt
 
 test_script:
-  - nosetests --cover-inclusive --cover-erase --cover-package=dvc --with-coverage
+  - python -mtests
 
 after_test:
   - if "%APPVEYOR_PULL_REQUEST_NUMBER%"=="" codecov
diff --git a/scripts/ci/script.sh b/scripts/ci/script.sh
index 60f50763b..283f7493d 100644
--- a/scripts/ci/script.sh
+++ b/scripts/ci/script.sh
@@ -3,7 +3,7 @@
 set -x
 set -e
 
-./unittests.sh
+python -mtests
 
 if [[ "$TRAVIS_PULL_REQUEST" == "false" && \
       "$TRAVIS_SECURE_ENV_VARS" == "true" ]]; then
diff --git a/tests/__main__.py b/tests/__main__.py
new file mode 100644
index 000000000..f0cea5e3c
--- /dev/null
+++ b/tests/__main__.py
@@ -0,0 +1,4 @@
+import nose
+
+if __name__ == '__main__':
+    nose.main(argv=['--cover-inclusive', '--cover-erase', '--cover-package=dvc', '--with-coverage'])
diff --git a/unittests.sh b/unittests.sh
deleted file mode 100755
index 31e89d2fc..000000000
--- a/unittests.sh
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/bin/bash
-set -e
-
-ulimit -n 2048
-
-nosetests --cover-inclusive --cover-erase --cover-package=dvc --with-coverage
-
-if [ "$1" = "report" ]; then
-    if [ -z "$CODECLIMATE_REPO_TOKEN" ]; then
-        echo "Error: CODECLIMATE_REPO_TOKEN is not defined! Reporting faied."
-    else
-        codeclimate-test-reporter --token $CODECLIMATE_REPO_TOKEN
-    fi
-fi
-