minor fix: fix tox config

Author: gurukamath

tox.ini

@@ -61,7 +61,7 @@ commands =
         -n auto --maxprocesses 5 \
         --ignore-glob='tests/fixtures/*' \
         --ignore-glob='eest_tests/*' \
-        --basetemp="{temp_dir}/pytest"
+        --basetemp="{temp_dir}/pytest" \
         tests
 
 [testenv:optimized]
@@ -78,7 +78,7 @@ commands =
         --ignore-glob='tests/test_t8n.py' \
         --ignore-glob='eest_tests/*' \
         --basetemp="{temp_dir}/pytest" \
-        --optimized
+        --optimized \
         tests
 
 [testenv:doc]