diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index 440df6a4718..edfed5148dc 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -169,8 +169,6 @@ jobs:
     uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.06
     if: fromJSON(needs.changed-files.outputs.changed_file_groups).test_python
     with:
-      # This selects "ARCH=amd64".
-      matrix_filter: map(select(.ARCH == "amd64"))
       build_type: pull-request
       script: "ci/test_python_cudf.sh"
   conda-python-other-tests:
@@ -250,8 +248,6 @@ jobs:
     uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.06
     if: fromJSON(needs.changed-files.outputs.changed_file_groups).test_python
     with:
-      # This selects "ARCH=amd64".
-      matrix_filter: map(select(.ARCH == "amd64"))
       build_type: pull-request
       script: ci/test_wheel_cudf.sh
   wheel-build-cudf-polars:
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 780c19d769d..5761320afd3 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -60,8 +60,6 @@ jobs:
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.06
     with:
-      # This selects "ARCH=amd64".
-      matrix_filter: map(select(.ARCH == "amd64"))
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
       date: ${{ inputs.date }}
@@ -72,8 +70,6 @@ jobs:
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.06
     with:
-      # This selects "ARCH=amd64".
-      matrix_filter: map(select(.ARCH == "amd64"))
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
       date: ${{ inputs.date }}
@@ -107,8 +103,6 @@ jobs:
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.06
     with:
-      # This selects "ARCH=amd64".
-      matrix_filter: map(select(.ARCH == "amd64"))
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
       date: ${{ inputs.date }}
@@ -118,8 +112,6 @@ jobs:
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.06
     with:
-      # This selects "ARCH=amd64".
-      matrix_filter: map(select(.ARCH == "amd64"))
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
       date: ${{ inputs.date }}
@@ -129,8 +121,6 @@ jobs:
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.06
     with:
-      # This selects "ARCH=amd64".
-      matrix_filter: map(select(.ARCH == "amd64"))
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
       date: ${{ inputs.date }}
@@ -152,8 +142,6 @@ jobs:
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.06
     with:
-      # This selects "ARCH=amd64".
-      matrix_filter: map(select(.ARCH == "amd64"))
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
       date: ${{ inputs.date }}
@@ -163,8 +151,6 @@ jobs:
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.06
     with:
-      # This selects "ARCH=amd64".
-      matrix_filter: map(select(.ARCH == "amd64"))
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
       date: ${{ inputs.date }}
diff --git a/ci/test_python_cudf.sh b/ci/test_python_cudf.sh
index 16ad33b7f27..7a477e8d2db 100755
--- a/ci/test_python_cudf.sh
+++ b/ci/test_python_cudf.sh
@@ -27,7 +27,8 @@ rapids-logger "pytest pylibcudf"
 rapids-logger "pytest cudf"
 ./ci/run_cudf_pytests.sh \
   --junitxml="${RAPIDS_TESTS_DIR}/junit-cudf.xml" \
-  --numprocesses=8 \
+  --numprocesses=1 \
+  -v \
   --dist=worksteal \
   --cov-config=../.coveragerc \
   --cov=cudf \