diff --git a/pytest_sentry.py b/pytest_sentry.py
index 9e18463..d545071 100644
--- a/pytest_sentry.py
+++ b/pytest_sentry.py
@@ -37,6 +37,25 @@
         "CI_PROJECT_PATH",
         "CI_SERVER_URL",
         "GITLAB_USER_NAME",  # The name of the user who started the job.
+        # CircleCI variables, as defined here https://circleci.com/docs/variables/#built-in-environment-variables
+        "CIRCLE_BRANCH", # The name of the Git branch currently being built.
+        "CIRCLE_BUILD_NUM", # The number of the current job. Job numbers are unique for each job.
+        "CIRCLE_BUILD_URL", # The URL for the current job on CircleCI.
+        "CIRCLE_JOB", # The name of the current job.
+        "CIRCLE_NODE_INDEX", # For jobs that run with parallelism enabled, this is the index of the current parallel run.
+        "CIRCLE_PR_NUMBER", # The number of the associated GitHub or Bitbucket pull request.
+        "CIRCLE_PR_REPONAME", # The name of the GitHub or Bitbucket repository where the pull request was created.
+        "CIRCLE_PR_USERNAME", # The GitHub or Bitbucket username of the user who created the pull request.
+        "CIRCLE_PROJECT_REPONAME", # The name of the repository of the current project.
+        "CIRCLE_PROJECT_USERNAME", # The GitHub or Bitbucket username of the current project.
+        "CIRCLE_PULL_REQUEST", # The URL of the associated pull request.
+        "CIRCLE_REPOSITORY_URL", # The URL of your GitHub or Bitbucket repository.
+        "CIRCLE_SHA1", # The SHA1 hash of the last commit of the current build.
+        "CIRCLE_TAG", # The name of the git tag, if the current build is tagged.
+        "CIRCLE_USERNAME", # The GitHub or Bitbucket username of the user who triggered the pipeline.
+        "CIRCLE_WORKFLOW_ID", # A unique identifier for the workflow instance of the current job. 
+        "CIRCLE_WORKFLOW_JOB_ID", # A unique identifier for the current job.
+        "CIRCLE_WORKFLOW_WORKSPACE_ID", # An identifier for the workspace of the current job. 
     ]
 )