diff --git a/.circleci/config.yml b/.circleci/config.yml
index 999bba1f9f77f..dfaade1d69c75 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -6,7 +6,7 @@ jobs:
       image: ubuntu-2004:2022.04.1
     resource_class: arm.large
     environment:
-      ENV_FILE: ci/deps/circle-39-arm64.yaml
+      ENV_FILE: ci/deps/circle-310-arm64.yaml
       PYTEST_WORKERS: auto
       PATTERN: "not single_cpu and not slow and not network and not clipboard and not arm_slow and not db"
       PYTEST_TARGET: "pandas"
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index bec07c077ad59..9ebe147008451 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -31,14 +31,14 @@ jobs:
         pattern: [""]
         include:
           - name: "Downstream Compat"
-            env_file: actions-39-downstream_compat.yaml
+            env_file: actions-311-downstream_compat.yaml
             pattern: "not slow and not network and not single_cpu"
             pytest_target: "pandas/tests/test_downstream.py"
           - name: "Minimum Versions"
             env_file: actions-39-minimum_versions.yaml
             pattern: "not slow and not network and not single_cpu"
           - name: "Locale: it_IT"
-            env_file: actions-310.yaml
+            env_file: actions-311.yaml
             pattern: "not slow and not network and not single_cpu"
             extra_apt: "language-pack-it"
             # Use the utf8 version as the default, it has no bad side-effect.
@@ -48,7 +48,7 @@ jobs:
             # It will be temporarily activated during tests with locale.setlocale
             extra_loc: "it_IT"
           - name: "Locale: zh_CN"
-            env_file: actions-310.yaml
+            env_file: actions-311.yaml
             pattern: "not slow and not network and not single_cpu"
             extra_apt: "language-pack-zh-hans"
             # Use the utf8 version as the default, it has no bad side-effect.
@@ -58,7 +58,7 @@ jobs:
             # It will be temporarily activated during tests with locale.setlocale
             extra_loc: "zh_CN"
           - name: "Copy-on-Write"
-            env_file: actions-310.yaml
+            env_file: actions-311.yaml
             pattern: "not slow and not network and not single_cpu"
             pandas_copy_on_write: "1"
           - name: "Pypy"
@@ -66,7 +66,7 @@ jobs:
             pattern: "not slow and not network and not single_cpu"
             test_args: "--max-worker-restart 0"
           - name: "Numpy Dev"
-            env_file: actions-310-numpydev.yaml
+            env_file: actions-311-numpydev.yaml
             pattern: "not slow and not network and not single_cpu"
             test_args: "-W error::DeprecationWarning -W error::FutureWarning"
             # TODO(cython3): Re-enable once next-beta(after beta 1) comes out
diff --git a/ci/deps/actions-39-downstream_compat.yaml b/ci/deps/actions-311-downstream_compat.yaml
similarity index 98%
rename from ci/deps/actions-39-downstream_compat.yaml
rename to ci/deps/actions-311-downstream_compat.yaml
index a036849cf01ba..2115ee8f7d86a 100644
--- a/ci/deps/actions-39-downstream_compat.yaml
+++ b/ci/deps/actions-311-downstream_compat.yaml
@@ -3,7 +3,7 @@ name: pandas-dev
 channels:
   - conda-forge
 dependencies:
-  - python=3.9
+  - python=3.11
 
   # build dependencies
   - versioneer[toml]
diff --git a/ci/deps/actions-310-numpydev.yaml b/ci/deps/actions-311-numpydev.yaml
similarity index 84%
rename from ci/deps/actions-310-numpydev.yaml
rename to ci/deps/actions-311-numpydev.yaml
index 4556b4567f2e0..5379c2fddec21 100644
--- a/ci/deps/actions-310-numpydev.yaml
+++ b/ci/deps/actions-311-numpydev.yaml
@@ -2,7 +2,7 @@ name: pandas-dev
 channels:
   - conda-forge
 dependencies:
-  - python=3.10
+  - python=3.11
 
   # build dependencies
   - versioneer[toml]
@@ -26,7 +26,7 @@ dependencies:
 
   - pip:
     - "cython"
-    - "--extra-index-url https://pypi.anaconda.org/scipy-wheels-nightly/simple"
+    - "--extra-index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple"
     - "--pre"
     - "numpy"
     - "scipy"
diff --git a/ci/deps/circle-39-arm64.yaml b/ci/deps/circle-310-arm64.yaml
similarity index 98%
rename from ci/deps/circle-39-arm64.yaml
rename to ci/deps/circle-310-arm64.yaml
index 37e01d2d0b2f9..1813dbe3a1df5 100644
--- a/ci/deps/circle-39-arm64.yaml
+++ b/ci/deps/circle-310-arm64.yaml
@@ -2,7 +2,7 @@ name: pandas-dev
 channels:
   - conda-forge
 dependencies:
-  - python=3.9
+  - python=3.10
 
   # build dependencies
   - versioneer[toml]
diff --git a/pandas/core/sorting.py b/pandas/core/sorting.py
index b63f3f28b8f6c..0c0b312c11c48 100644
--- a/pandas/core/sorting.py
+++ b/pandas/core/sorting.py
@@ -424,7 +424,7 @@ def lexsort_indexer(
 
 def nargsort(
     items: ArrayLike | Index | Series,
-    kind: SortKind = "quicksort",
+    kind: SortKind = "stable",
     ascending: bool = True,
     na_position: str = "last",
     key: Callable | None = None,
diff --git a/pandas/core/window/rolling.py b/pandas/core/window/rolling.py
index 86b4e399fa461..7220b44c7af9d 100644
--- a/pandas/core/window/rolling.py
+++ b/pandas/core/window/rolling.py
@@ -1140,7 +1140,7 @@ def _validate(self):
         if not isinstance(self.win_type, str):
             raise ValueError(f"Invalid win_type {self.win_type}")
         signal = import_optional_dependency(
-            "scipy.signal", extra="Scipy is required to generate window weight."
+            "scipy.signal.windows", extra="Scipy is required to generate window weight."
         )
         self._scipy_weight_generator = getattr(signal, self.win_type, None)
         if self._scipy_weight_generator is None: