diff --git a/utbot-python/samples/run_tests_all.sh b/utbot-python/samples/run_tests_all.sh
index 1914ea5df6..c6a75a02d4 100755
--- a/utbot-python/samples/run_tests_all.sh
+++ b/utbot-python/samples/run_tests_all.sh
@@ -1,5 +1,6 @@
 python_path=$1
 
+rm -r utbot_coverage utbot_tests RUN_RESULT COVERAGE_RESULT
 mkdir utbot_coverage
 $python_path run_tests.py generate java ../../utbot-cli-python/build/libs/utbot-cli-python*.jar . -c test_configuration.json -p $python_path -o utbot_tests -i utbot_coverage