diff --git a/.ci/install.sh b/.ci/install.sh
index cd2bf93931f..1832e427898 100755
--- a/.ci/install.sh
+++ b/.ci/install.sh
@@ -17,20 +17,19 @@ aptget_update || aptget_update retry || aptget_update retry
 
 set -e
 
-sudo apt-get -qq install libfreetype6-dev liblcms2-dev libtiff-dev python3-tk\
-                         ghostscript libjpeg-turbo8-dev libopenjp2-7-dev\
-                         cmake meson imagemagick libharfbuzz-dev libfribidi-dev\
-                         sway wl-clipboard libopenblas-dev nasm
+packages=(libfreetype6-dev liblcms2-dev libtiff-dev python3-tk
+          ghostscript libjpeg-turbo8-dev libopenjp2-7-dev
+          cmake meson libharfbuzz-dev libfribidi-dev
+          sway wl-clipboard nasm
+          # ImageMagick is used by Tests/test_file_palm.py
+          imagemagick
+          # netpbm provides ppmquant and ppmtogif for GifImagePlugin._save_netpbm
+          netpbm)
+sudo apt-get -qq install --no-install-recommends "${packages[@]}"
 
 python3 -m pip install --upgrade pip
-python3 -m pip install --upgrade wheel
-python3 -m pip install coverage
-python3 -m pip install defusedxml
-python3 -m pip install ipython
-python3 -m pip install olefile
-python3 -m pip install -U pytest
-python3 -m pip install -U pytest-cov
-python3 -m pip install -U pytest-timeout
+python3 -m pip install --upgrade coverage defusedxml ipython olefile pytest pytest-cov pytest-timeout
+
 # optional test dependencies, only install if there's a binary package.
 python3 -m pip install --only-binary=:all: numpy || true
 python3 -m pip install --only-binary=:all: pyarrow || true
diff --git a/.github/workflows/macos-install.sh b/.github/workflows/macos-install.sh
index e95a786d758..cfa7f8e0ec4 100755
--- a/.github/workflows/macos-install.sh
+++ b/.github/workflows/macos-install.sh
@@ -3,15 +3,9 @@
 set -e
 
 brew bundle --file=.github/workflows/Brewfile
-export PKG_CONFIG_PATH="/usr/local/opt/openblas/lib/pkgconfig"
 
-python3 -m pip install coverage
-python3 -m pip install defusedxml
-python3 -m pip install ipython
-python3 -m pip install olefile
-python3 -m pip install -U pytest
-python3 -m pip install -U pytest-cov
-python3 -m pip install -U pytest-timeout
+python3 -m pip install --upgrade coverage defusedxml ipython olefile pytest pytest-cov pytest-timeout
+
 # optional test dependencies, only install if there's a binary package.
 python3 -m pip install --only-binary=:all: numpy || true
 python3 -m pip install --only-binary=:all: pyarrow || true