diff --git a/CHANGELOG.md b/CHANGELOG.md
index 783342c..c9f501d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@ and Base versions are tracked in the repo-root `VERSION` file.
 
 ### Changed
 
+- Suppressed pip self-upgrade notices during Base-managed pip installs so
+  setup output stays focused on Base actions and real install failures.
 - Made live workflow docs and installer examples main-ready, using default-branch
   URLs for raw GitHub install scripts and `main` for contributor branch
   examples.
diff --git a/cli/bash/commands/basectl/subcommands/setup_common.sh b/cli/bash/commands/basectl/subcommands/setup_common.sh
index 8943465..513a304 100644
--- a/cli/bash/commands/basectl/subcommands/setup_common.sh
+++ b/cli/bash/commands/basectl/subcommands/setup_common.sh
@@ -713,7 +713,7 @@ setup_install_base_python_package() {
     python_bin="$(setup_base_venv_python_bin "$venv_dir")" || fatal_error "Base virtual environment Python was not found at '$venv_dir/bin/python'. $(setup_recovery_venv)"
 
     log_info "Installing Python package '$package' in the Base virtual environment."
-    run "$python_bin" -m pip install "$package"
+    run "$python_bin" -m pip install --disable-pip-version-check "$package"
 }
 
 setup_install_pyyaml() {
diff --git a/cli/bash/commands/basectl/tests/setup.bats b/cli/bash/commands/basectl/tests/setup.bats
index f7ca66d..37e9c60 100644
--- a/cli/bash/commands/basectl/tests/setup.bats
+++ b/cli/bash/commands/basectl/tests/setup.bats
@@ -61,7 +61,7 @@ if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "show" && "${4:-}" ==
     [[ -f "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-installed" ]]
     exit $?
 fi
-if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "$pyyaml_package" ]]; then
+if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "--disable-pip-version-check" && "${5:-}" == "$pyyaml_package" ]]; then
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-install-ran"
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-installed"
     exit 0
@@ -70,7 +70,7 @@ if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "show" && "${4:-}" ==
     [[ -f "${BASE_SETUP_TEST_STATE_DIR:?}/click-installed" ]]
     exit $?
 fi
-if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "$click_package" ]]; then
+if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "--disable-pip-version-check" && "${5:-}" == "$click_package" ]]; then
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/click-install-ran"
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/click-installed"
     exit 0
@@ -120,6 +120,41 @@ EOF
     [[ "$(cat "$TEST_STATE_DIR/project-setup-python")" != *"$inherited_venv/bin/python"* ]]
 }
 
+@test "setup installs Base Python packages without pip self-version notices" {
+    local bash_libs_dir
+    local venv_dir="$TEST_HOME/.base.d/base/.venv"
+
+    bash_libs_dir="$(base_bash_libs_fixture_dir)"
+    mkdir -p "$venv_dir/bin"
+    : > "$venv_dir/pyvenv.cfg"
+    cat > "$venv_dir/bin/python" <<'EOF'
+#!/usr/bin/env bash
+if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "show" ]]; then
+    exit 1
+fi
+if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" ]]; then
+    printf '%s\n' "$@" > "${BASE_SETUP_TEST_STATE_DIR:?}/pip-install-args"
+    exit 0
+fi
+printf 'unexpected venv python args: %s\n' "$*" >&2
+exit 1
+EOF
+    chmod +x "$venv_dir/bin/python"
+
+    run env \
+        HOME="$TEST_HOME" \
+        PATH="$TEST_MOCKBIN:$TEST_BASH_BIN_DIR:/usr/bin:/bin:/usr/sbin:/sbin" \
+        OSTYPE=darwin24 \
+        BASE_HOME="$BASE_REPO_ROOT" \
+        BASE_BASH_LIBS_DIR="$bash_libs_dir" \
+        BASE_SETUP_VENV_DIR="$venv_dir" \
+        BASE_SETUP_TEST_STATE_DIR="$TEST_STATE_DIR" \
+        bash -c 'source "$BASE_HOME/base_init.sh"; source "$BASE_HOME/cli/bash/commands/basectl/subcommands/setup_common.sh"; setup_install_base_python_package requests'
+
+    [ "$status" -eq 0 ]
+    grep -Fxq -- "--disable-pip-version-check" "$TEST_STATE_DIR/pip-install-args"
+}
+
 @test "basectl setup installs missing dependencies and creates the Base virtual environment" {
     local installer
     local venv_dir="$TEST_HOME/.base.d/base/.venv"
diff --git a/cli/bash/commands/basectl/tests/setup_helpers.bash b/cli/bash/commands/basectl/tests/setup_helpers.bash
index 8f8c098..7bec1fc 100644
--- a/cli/bash/commands/basectl/tests/setup_helpers.bash
+++ b/cli/bash/commands/basectl/tests/setup_helpers.bash
@@ -102,7 +102,7 @@ if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "show" && "${4:-}" ==
     [[ -f "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-installed" ]]
     exit $?
 fi
-if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "$pyyaml_package" ]]; then
+if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "--disable-pip-version-check" && "${5:-}" == "$pyyaml_package" ]]; then
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-install-ran"
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-installed"
     exit 0
@@ -111,7 +111,7 @@ if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "show" && "${4:-}" ==
     [[ -f "${BASE_SETUP_TEST_STATE_DIR:?}/click-installed" ]]
     exit $?
 fi
-if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "$click_package" ]]; then
+if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "--disable-pip-version-check" && "${5:-}" == "$click_package" ]]; then
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/click-install-ran"
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/click-installed"
     exit 0
@@ -198,7 +198,7 @@ if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "show" && "${4:-}" ==
     [[ -f "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-installed" ]]
     exit $?
 fi
-if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "$pyyaml_package" ]]; then
+if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "--disable-pip-version-check" && "${5:-}" == "$pyyaml_package" ]]; then
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-install-ran"
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-installed"
     exit 0
@@ -207,7 +207,7 @@ if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "show" && "${4:-}" ==
     [[ -f "${BASE_SETUP_TEST_STATE_DIR:?}/click-installed" ]]
     exit $?
 fi
-if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "$click_package" ]]; then
+if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "--disable-pip-version-check" && "${5:-}" == "$click_package" ]]; then
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/click-install-ran"
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/click-installed"
     exit 0
@@ -346,7 +346,7 @@ if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "show" && "${4:-}" ==
     [[ -f "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-installed" ]]
     exit $?
 fi
-if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "$pyyaml_package" ]]; then
+if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "--disable-pip-version-check" && "${5:-}" == "$pyyaml_package" ]]; then
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-install-ran"
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/pyyaml-installed"
     exit 0
@@ -355,7 +355,7 @@ if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "show" && "${4:-}" ==
     [[ -f "${BASE_SETUP_TEST_STATE_DIR:?}/click-installed" ]]
     exit $?
 fi
-if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "$click_package" ]]; then
+if [[ "${1:-}" == "-m" && "${2:-}" == "pip" && "${3:-}" == "install" && "${4:-}" == "--disable-pip-version-check" && "${5:-}" == "$click_package" ]]; then
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/click-install-ran"
     touch "${BASE_SETUP_TEST_STATE_DIR:?}/click-installed"
     exit 0
diff --git a/cli/python/base_setup/artifacts.py b/cli/python/base_setup/artifacts.py
index 133b526..6e18d6f 100644
--- a/cli/python/base_setup/artifacts.py
+++ b/cli/python/base_setup/artifacts.py
@@ -3,6 +3,7 @@
 import os
 import subprocess
 import venv
+from collections.abc import Iterable
 from pathlib import Path
 
 import base_cli
@@ -13,6 +14,8 @@
 from .manifest import ArtifactRequest
 from .registry import ArtifactDefinition, get_artifact_definition
 
+PIP_INSTALL_COMMAND_PREFIX = ("-m", "pip", "install", "--disable-pip-version-check")
+
 
 def homebrew_no_auto_update_env() -> dict[str, str]:
     env = os.environ.copy()
@@ -309,7 +312,7 @@ def reconcile_python_artifacts(
     if dry_run:
         if not python_bin.exists():
             ctx.log.info("[DRY-RUN] Would create project virtual environment at '%s'.", venv_dir)
-        process.dry_run_command(ctx, [str(python_bin), "-m", "pip", "install", *requirements])
+        process.dry_run_command(ctx, pip_install_command(python_bin, requirements))
         return
 
     if not python_bin.exists():
@@ -318,7 +321,7 @@ def reconcile_python_artifacts(
 
     names = ", ".join(definition.name for definition, _version, _requirement in missing)
     ctx.log.info("Installing Python artifacts into project virtual environment: %s.", names)
-    command = [str(python_bin), "-m", "pip", "install", *requirements]
+    command = pip_install_command(python_bin, requirements)
     try:
         process.run_command(ctx, command)
     except ArtifactError as exc:
@@ -342,13 +345,17 @@ def reconcile_python_artifacts_sequential(
             )
             continue
         ctx.log.info("Installing Python artifact '%s' into project virtual environment.", definition.name)
-        process.run_command(ctx, [str(python_bin), "-m", "pip", "install", requirement])
+        process.run_command(ctx, pip_install_command(python_bin, (requirement,)))
 
 
 def python_requirement(definition: ArtifactDefinition, version: str) -> str:
     return f"{definition.package}=={version}" if version != "latest" else definition.package
 
 
+def pip_install_command(python_bin: Path, requirements: Iterable[str]) -> list[str]:
+    return [str(python_bin), *PIP_INSTALL_COMMAND_PREFIX, *requirements]
+
+
 def project_venv_dir(project: str) -> Path:
     override = os.environ.get("BASE_PROJECT_VENV_DIR")
     if override:
diff --git a/cli/python/base_setup/tests/test_artifacts.py b/cli/python/base_setup/tests/test_artifacts.py
index 9108079..0f0fa5e 100644
--- a/cli/python/base_setup/tests/test_artifacts.py
+++ b/cli/python/base_setup/tests/test_artifacts.py
@@ -181,7 +181,7 @@ def test_unknown_python_package_artifact_dry_run_uses_pip(self) -> None:
             status, _stdout, stderr = run_engine(["--dry-run", "--manifest", str(manifest_path)])
 
         self.assertEqual(status, 0)
-        self.assertIn("pip install click==8.4.1 PyYAML==6.0.3 rich", stderr)
+        self.assertIn("pip install --disable-pip-version-check click==8.4.1 PyYAML==6.0.3 rich", stderr)
 
     @unittest.skipUnless(importlib.util.find_spec("click"), "Click is not installed")
     def test_dry_run_ignores_inherited_project_runtime_environment(self) -> None:
@@ -217,7 +217,7 @@ def test_dry_run_ignores_inherited_project_runtime_environment(self) -> None:
 
         self.assertEqual(status, 0)
         self.assertNotIn(str(inherited_venv_dir), stderr)
-        self.assertIn("pip install click==8.4.1 PyYAML==6.0.3 rich", stderr)
+        self.assertIn("pip install --disable-pip-version-check click==8.4.1 PyYAML==6.0.3 rich", stderr)
 
     @unittest.skipUnless(importlib.util.find_spec("click"), "Click is not installed")
     def test_known_homebrew_artifact_dry_run_does_not_require_brew(self) -> None:
@@ -392,7 +392,7 @@ def test_python_artifact_honors_project_venv_dir_override(self) -> None:
             info_messages,
         )
         self.assertIn(
-            f"[DRY-RUN] Would run: {venv_dir}/bin/python -m pip install requests",
+            f"[DRY-RUN] Would run: {venv_dir}/bin/python -m pip install --disable-pip-version-check requests",
             info_messages,
         )
 
@@ -444,7 +444,15 @@ def test_reconcile_artifacts_batches_python_installs(self) -> None:
 
         run_command.assert_called_once_with(
             ctx,
-            [str(python_bin), "-m", "pip", "install", "click==8.4.1", "requests"],
+            [
+                str(python_bin),
+                "-m",
+                "pip",
+                "install",
+                "--disable-pip-version-check",
+                "click==8.4.1",
+                "requests",
+            ],
         )
 
     def test_reconcile_artifacts_retries_python_installs_sequentially_after_batch_failure(self) -> None:
@@ -480,9 +488,40 @@ def test_reconcile_artifacts_retries_python_installs_sequentially_after_batch_fa
         self.assertEqual(
             run_command.call_args_list,
             [
-                mock.call(ctx, [str(python_bin), "-m", "pip", "install", "click==8.4.1", "requests"]),
-                mock.call(ctx, [str(python_bin), "-m", "pip", "install", "click==8.4.1"]),
-                mock.call(ctx, [str(python_bin), "-m", "pip", "install", "requests"]),
+                mock.call(
+                    ctx,
+                    [
+                        str(python_bin),
+                        "-m",
+                        "pip",
+                        "install",
+                        "--disable-pip-version-check",
+                        "click==8.4.1",
+                        "requests",
+                    ],
+                ),
+                mock.call(
+                    ctx,
+                    [
+                        str(python_bin),
+                        "-m",
+                        "pip",
+                        "install",
+                        "--disable-pip-version-check",
+                        "click==8.4.1",
+                    ],
+                ),
+                mock.call(
+                    ctx,
+                    [
+                        str(python_bin),
+                        "-m",
+                        "pip",
+                        "install",
+                        "--disable-pip-version-check",
+                        "requests",
+                    ],
+                ),
             ],
         )
         ctx.log.warning.assert_called_once_with(