diff --git a/conda/environments/cudf_dev_cuda11.0.yml b/conda/environments/cudf_dev_cuda11.0.yml
index 5954525b924..4d106409e1e 100644
--- a/conda/environments/cudf_dev_cuda11.0.yml
+++ b/conda/environments/cudf_dev_cuda11.0.yml
@@ -7,8 +7,8 @@ channels:
   - rapidsai-nightly
   - conda-forge
 dependencies:
-  - clang=11.0.0
-  - clang-tools=11.0.0
+  - clang=11.1.0
+  - clang-tools=11.1.0
   - cupy>=9.5.0,<10.0.0a0
   - rmm=21.12.*
   - cmake>=3.20.1
diff --git a/conda/environments/cudf_dev_cuda11.2.yml b/conda/environments/cudf_dev_cuda11.2.yml
index 0d1989fa213..46785603c0e 100644
--- a/conda/environments/cudf_dev_cuda11.2.yml
+++ b/conda/environments/cudf_dev_cuda11.2.yml
@@ -7,8 +7,8 @@ channels:
   - rapidsai-nightly
   - conda-forge
 dependencies:
-  - clang=11.0.0
-  - clang-tools=11.0.0
+  - clang=11.1.0
+  - clang-tools=11.1.0
   - cupy>=9.5.0,<10.0.0a0
   - rmm=21.12.*
   - cmake>=3.20.1
diff --git a/conda/environments/cudf_dev_cuda11.5.yml b/conda/environments/cudf_dev_cuda11.5.yml
index d759ca94fbf..635d838640d 100644
--- a/conda/environments/cudf_dev_cuda11.5.yml
+++ b/conda/environments/cudf_dev_cuda11.5.yml
@@ -7,8 +7,8 @@ channels:
   - rapidsai-nightly
   - conda-forge
 dependencies:
-  - clang=11.0.0
-  - clang-tools=11.0.0
+  - clang=11.1.0
+  - clang-tools=11.1.0
   - cupy>=9.5.0,<10.0.0a0
   - rmm=21.12.*
   - cmake>=3.20.1
diff --git a/cpp/scripts/run-clang-format.py b/cpp/scripts/run-clang-format.py
index 178bf2f0c78..a7c83da22c5 100755
--- a/cpp/scripts/run-clang-format.py
+++ b/cpp/scripts/run-clang-format.py
@@ -22,7 +22,7 @@
 import sys
 import tempfile
 
-EXPECTED_VERSION = "11.0.0"
+EXPECTED_VERSION = "11.1.0"
 VERSION_REGEX = re.compile(r"clang-format version ([0-9.]+)")
 # NOTE: populate this list with more top-level dirs as we add more of them to
 # the cudf repo
diff --git a/python/cudf/cudf/tests/test_concat.py b/python/cudf/cudf/tests/test_concat.py
index bb96f3c4290..46707a283af 100644
--- a/python/cudf/cudf/tests/test_concat.py
+++ b/python/cudf/cudf/tests/test_concat.py
@@ -576,7 +576,7 @@ def test_concat_empty_dataframes(df, other, ignore_index):
     if expected.shape != df.shape:
         for key, col in actual[actual.columns].iteritems():
             if is_categorical_dtype(col.dtype):
-                if expected[key].dtype != "category":
+                if not is_categorical_dtype(expected[key].dtype):
                     # TODO: Pandas bug:
                     # https://github.com/pandas-dev/pandas/issues/42840
                     expected[key] = expected[key].fillna("-1").astype("str")
@@ -1186,7 +1186,7 @@ def test_concat_join_empty_dataframes(
         if axis == 0:
             for key, col in actual[actual.columns].iteritems():
                 if is_categorical_dtype(col.dtype):
-                    if expected[key].dtype != "category":
+                    if not is_categorical_dtype(expected[key].dtype):
                         # TODO: Pandas bug:
                         # https://github.com/pandas-dev/pandas/issues/42840
                         expected[key] = (