diff --git a/.circleci/config.yml b/.circleci/config.yml
index d6d621145a1e99a23a1fb39d87aaf23849e569b7..1fe7f3bb992cdd0e647be76a5faf1ce8b6e0a189 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -12,7 +12,7 @@ commands:
       - run:
           command: |
             pip install -r requirements.txt
-            pip install -U pytest-xdist pytest-cov pytest pytest-forked pluggy py opentracing
+            pip install -U pytest-xdist pytest-cov pytest pytest-forked pluggy py
             pip install .
   unit_test:
     description: Run the unit tests
diff --git a/pyproject.toml b/pyproject.toml
index 3bffd2735a0ad4c346203e1403f9a3d34773c5ca..d44d26477bdbf1f394bf0fc7264e75ecff155ffb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -99,7 +99,7 @@ disable = '''
 [tool.coverage.run]
 branch = true
 source = ["satella"]
-concurrency = "thread"
+concurrency = ["thread"]
 omit= [
   "tests/*",
   ".eggs/*",
diff --git a/requirements.txt b/requirements.txt
index 379572279d34ef27b13a4842230486176585efd0..c87e4aa6e2743d83165a0e9c5739e89db784a68e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@ psutil
 pyyaml
 toml
 requests
+opentracing