diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0fbbd3ce..eec66b32 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -14,6 +14,8 @@ commands:
             echo 'export TEST_DIR=$HOME/test_results' >> $BASH_ENV
             echo 'export TEST_NAME=astro_analysis' >> $BASH_ENV
             echo 'export TEST_FLAGS="--nologcapture -v --with-answer-testing --local --local-dir $TEST_DIR --answer-name=$TEST_NAME --answer-big-data"' >> $BASH_ENV
+            echo 'export PRTE_MCA_rmaps_default_mapping_policy=:oversubscribe' >> $BASH_ENV
+            echo 'export OMPI_MCA_rmaps_base_oversubscribe=true' >> $BASH_ENV
 
   install-with-yt-dev:
     description: "Install dependencies with yt from source."
@@ -279,20 +281,20 @@ workflows:
    normal-tests:
      jobs:
        - run-tests:
-           name: "Python 3.9 tests"
-           tag: "3.9"
-
-       - run-tests-pytest:
            name: "Python 3.10 tests"
            tag: "3.10"
 
        - run-tests-pytest:
-           name: "Python 3.11 tests"
-           tag: "3.11"
+           name: "Python 3.13 tests"
+           tag: "3.13"
+
+       - run-tests-pytest:
+           name: "Python 3.12 tests"
+           tag: "3.12"
 
        - docs-test:
            name: "Test docs build"
-           tag: "3.9"
+           tag: "3.13"
 
    weekly:
      triggers:
@@ -304,13 +306,13 @@ workflows:
                 - main
      jobs:
        - run-tests:
-           name: "Python 3.9 tests"
-           tag: "3.9"
+           name: "Python 3.13 tests"
+           tag: "3.13"
 
        - run-tests-pytest:
-           name: "Python 3.11 tests"
-           tag: "3.11"
+           name: "Python 3.13 tests"
+           tag: "3.13"
 
        - docs-test:
            name: "Test docs build"
-           tag: "3.9"
+           tag: "3.13"
diff --git a/pyproject.toml b/pyproject.toml
index 12ff6de4..9811e6ab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -101,7 +101,7 @@ select = [
 combine-as-imports = true
 known-third-party = [
   "IPython",
-  "nose",
+  "pynose",
   "numpy",
   "sympy",
   "matplotlib",
diff --git a/requirements/tests.txt b/requirements/tests.txt
index e3dfe645..d0d2b198 100644
--- a/requirements/tests.txt
+++ b/requirements/tests.txt
@@ -3,7 +3,7 @@ astropy
 scipy
 
 # test dependencies
-nose
+pynose
 nose-timer
 pytest
 girder-client