diff --git a/plugins/python-build/test/build.bats b/plugins/python-build/test/build.bats
index 8e3ce566..95ab1fc8 100644
--- a/plugins/python-build/test/build.bats
+++ b/plugins/python-build/test/build.bats
@@ -62,7 +62,7 @@ assert_build_log() {
   cached_tarball "yaml-0.1.6"
   cached_tarball "Python-3.6.2"
 
-  for i in {1..10}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
   stub brew false
   stub_make_install
   stub_make_install
@@ -104,7 +104,7 @@ OUT
   cached_tarball "yaml-0.1.6" "$yaml_configure"
   cached_tarball "Python-3.6.2"
 
-  for i in {1..10}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
   stub brew false
   stub_make_install
   stub_make_install "$PYTHON_MAKE_INSTALL_TARGET"
@@ -132,7 +132,7 @@ OUT
   cached_tarball "yaml-0.1.6"
   cached_tarball "Python-3.6.2"
 
-  for i in {1..10}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
   stub brew false
   stub_make_install
   stub_make_install
@@ -162,7 +162,7 @@ OUT
   cached_tarball "yaml-0.1.6"
   cached_tarball "Python-3.6.2"
 
-  for i in {1..10}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
   stub brew false
   stub_make_install
   stub_make_install
@@ -194,8 +194,8 @@ OUT
   BREW_PREFIX="$TMP/homebrew-prefix"
   mkdir -p "$BREW_PREFIX"
 
-  for i in {1..9}; do stub uname '-s : echo Darwin'; done
-  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
   stub brew "--prefix : echo '$BREW_PREFIX'" false
   stub_make_install
 
@@ -222,8 +222,8 @@ OUT
   brew_libdir="$TMP/homebrew-yaml"
   mkdir -p "$brew_libdir"
 
-  for i in {1..10}; do stub uname '-s : echo Darwin'; done
-  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
   stub brew "--prefix libyaml : echo '$brew_libdir'"
   for i in {1..6}; do stub brew false; done
   stub_make_install
@@ -249,8 +249,8 @@ OUT
 
   readline_libdir="$TMP/homebrew-readline"
   mkdir -p "$readline_libdir"
-  for i in {1..8}; do stub uname '-s : echo Darwin'; done
-  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
   for i in {1..3}; do stub brew false; done
   stub brew "--prefix readline : echo '$readline_libdir'"
   for i in {1..2}; do stub brew false; done
@@ -279,8 +279,8 @@ OUT
 
   ncurses_libdir="$TMP/homebrew-ncurses"
   mkdir -p "$ncurses_libdir"
-  for i in {1..9}; do stub uname '-s : echo Darwin'; done
-  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
   for i in {1..4}; do stub brew false; done
   stub brew "--prefix ncurses : echo '$ncurses_libdir'"
   stub brew false
@@ -307,9 +307,9 @@ OUT
 @test "openssl is linked from Ports in FreeBSD if present" {
   cached_tarball "Python-3.6.2"
 
-  for i in {1..7}; do stub uname '-s : echo FreeBSD'; done
+  stub uname '-s : echo FreeBSD'
   stub uname '-r : echo 11.0-RELEASE'
-  for i in {1..3}; do stub uname '-s : echo FreeBSD'; done
+  stub uname '-s : echo FreeBSD'
   stub sysctl '-n hw.ncpu : echo 1'
 
   stub pkg "info -e openssl : true"
@@ -341,9 +341,9 @@ OUT
 
   for lib in readline sqlite3; do
 
-    for i in {1..7}; do stub uname '-s : echo FreeBSD'; done
+    stub uname '-s : echo FreeBSD'
     stub uname '-r : echo 11.0-RELEASE'
-    for i in {1..3}; do stub uname '-s : echo FreeBSD'; done
+    stub uname '-s : echo FreeBSD'
     stub sysctl '-n hw.ncpu : echo 1'
 
     stub pkg false
@@ -376,8 +376,8 @@ OUT
 @test "homebrew is not touched if PYTHON_BUILD_SKIP_HOMEBREW is set" {
   cached_tarball "Python-3.6.2"
 
-  for i in {1..4}; do stub uname '-s : echo Darwin'; done
-  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
   stub brew true; brew
   stub_make_install
   export PYTHON_BUILD_SKIP_HOMEBREW=1
@@ -405,7 +405,7 @@ OUT
   BREW_PREFIX="$TMP/homebrew-prefix"
   mkdir -p "$BREW_PREFIX"
 
-  for i in {1..4}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
   stub brew "--prefix : echo '$BREW_PREFIX'"
   for i in {1..5}; do stub brew false; done
   stub_make_install
@@ -435,7 +435,7 @@ OUT
   BREW_PREFIX="${BREW_PREFIX%/*}"
   BREW_PREFIX="${BREW_PREFIX%/*}"
 
-  for i in {1..4}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
   stub brew "--prefix : echo '$BREW_PREFIX'"
   for i in {1..5}; do stub brew false; done
   stub_make_install
@@ -464,7 +464,7 @@ OUT
   BREW_PREFIX="$TMP/homebrew-prefix"
   mkdir -p "$BREW_PREFIX"
 
-  for i in {1..9}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
   for i in {1..5}; do stub brew "--prefix : echo '$BREW_PREFIX'"; done
   stub_make_install
 
@@ -493,8 +493,8 @@ OUT
   mkdir -p "$readline_libdir/include/readline"
   touch "$readline_libdir/include/readline/rlconf.h"
 
-  for i in {1..8}; do stub uname '-s : echo Darwin'; done
-  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
 
   for i in {1..5}; do stub brew false; done
   stub_make_install
@@ -525,8 +525,8 @@ OUT
   mkdir -p "$tcl_tk_libdir/lib"
   echo "TCL_VERSION='$tcl_tk_version'" >>"$tcl_tk_libdir/lib/tclConfig.sh"
 
-  for i in {1..9}; do stub uname '-s : echo Darwin'; done
-  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
 
   stub brew false
   stub brew "--prefix tcl-tk@8 : echo '$tcl_tk_libdir'"
@@ -559,8 +559,8 @@ OUT
   tcl_tk_version_long="8.6.10"
   tcl_tk_version="${tcl_tk_version_long%.*}"
 
-  for i in {1..8}; do stub uname '-s : echo Darwin'; done
-  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
 
   for i in {1..4}; do stub brew false; done
   stub_make_install
@@ -587,8 +587,8 @@ OUT
 @test "tcl-tk is linked from Homebrew via pkgconfig only when envvar is set" {
   cached_tarball "Python-3.6.2"
 
-  for i in {1..9}; do stub uname '-s : echo Darwin'; done
-  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
 
   tcl_tk_libdir="$TMP/homebrew-tcl-tk"
   mkdir -p "$tcl_tk_libdir/lib"
@@ -620,7 +620,7 @@ OUT
 @test "number of CPU cores defaults to 2" {
   cached_tarball "Python-3.6.2"
 
-  for i in {1..10}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
   for i in {1..2}; do stub sw_vers '-productVersion : echo 10.10'; done
 
   stub sysctl false
@@ -647,7 +647,7 @@ OUT
 @test "number of CPU cores is detected on Mac" {
   cached_tarball "Python-3.6.2"
 
-  for i in {1..10}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
   for i in {1..2}; do stub sw_vers '-productVersion : echo 10.10'; done
 
   stub sysctl '-n hw.ncpu : echo 4'
@@ -675,9 +675,9 @@ OUT
 @test "number of CPU cores is detected on FreeBSD" {
   cached_tarball "Python-3.6.2"
 
-  for i in {1..7}; do stub uname '-s : echo FreeBSD'; done
+  stub uname '-s : echo FreeBSD'
   stub uname '-r : echo 11.0-RELEASE'
-  for i in {1..3}; do stub uname '-s : echo FreeBSD'; done
+  stub uname '-s : echo FreeBSD'
   for i in {1..3}; do stub pkg false; done
 
   stub sysctl '-n hw.ncpu : echo 1'
@@ -704,7 +704,7 @@ OUT
 @test "setting PYTHON_MAKE_INSTALL_OPTS to a multi-word string" {
   cached_tarball "Python-3.6.2"
 
-  for i in {1..9}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
 
   stub_make_install
 
@@ -728,7 +728,7 @@ OUT
 @test "--enable-shared is not added if --disable-shared is passed" {
   cached_tarball "Python-3.6.2"
 
-  for i in {1..9}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
 
   stub_make_install
 
@@ -752,8 +752,8 @@ OUT
 @test "configuring with dSYM in MacOS" {
   cached_tarball "Python-3.6.2"
 
-  for i in {1..10}; do stub uname '-s : echo Darwin'; done
-  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
   for i in {1..6}; do stub brew false; done
   stub_make_install
 
@@ -779,7 +779,7 @@ OUT
 @test "configuring with dSYM has no effect in non-MacOS" {
   cached_tarball "Python-3.6.2"
 
-  for i in {1..10}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
   stub_make_install
 
   run_inline_definition <<DEF
@@ -866,7 +866,7 @@ apply -p1 -i /my/patch.diff
 exec ./configure "\$@"
 CONF
 
-  for i in {1..9}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
   stub apply 'echo apply "$@" >> build.log'
   stub_make_install
 
diff --git a/plugins/python-build/test/compiler.bats b/plugins/python-build/test/compiler.bats
index 61ff22be..998b977c 100644
--- a/plugins/python-build/test/compiler.bats
+++ b/plugins/python-build/test/compiler.bats
@@ -9,7 +9,7 @@ export -n PYTHON_CONFIGURE_OPTS
 
 @test "require_gcc on OS X 10.9" {
 
-  for i in {1..3}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
   for i in {1..2}; do stub sw_vers '-productVersion : echo 10.9.5'; done
 
   stub gcc '--version : echo 4.2.1'
@@ -31,7 +31,7 @@ OUT
 }
 
 @test "require_gcc on OS X 10.10" {
-  for i in {1..3}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
   for i in {1..2}; do stub sw_vers '-productVersion : echo 10.10'; done
 
   stub gcc '--version : echo 4.2.1'
@@ -69,7 +69,7 @@ DEF
   mkdir -p "$INSTALL_ROOT"
   cd "$INSTALL_ROOT"
 
-  for i in {1..10}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
   for i in {1..3}; do stub sw_vers '-productVersion : echo 10.10'; done
 
   stub cc 'false'
diff --git a/plugins/python-build/test/pyenv_ext.bats b/plugins/python-build/test/pyenv_ext.bats
index a4d45901..4fc46a8d 100644
--- a/plugins/python-build/test/pyenv_ext.bats
+++ b/plugins/python-build/test/pyenv_ext.bats
@@ -144,7 +144,7 @@ OUT
   echo "bar" | install_patch definitions/vanilla-python "Python-3.6.2/bar.patch"
   echo "baz" | install_patch definitions/vanilla-python "Python-3.6.2/baz.patch"
 
-  for i in {1..2}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
 
   TMPDIR="$TMP" install_tmp_fixture definitions/vanilla-python < /dev/null
   assert_success
@@ -171,7 +171,7 @@ OUT
     " : echo \"$MAKE \$@\" >> build.log" \
     " : echo \"$MAKE \$@\" >> build.log && cat build.log >> '$INSTALL_ROOT/build.log'"
 
-  for i in {1..4}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
 
   PYTHON_MAKE_INSTALL_TARGET="altinstall" TMPDIR="$TMP" install_tmp_fixture definitions/vanilla-python < /dev/null
   assert_success
@@ -253,7 +253,7 @@ OUT
   done
   unset framework_path executable
 
-  for i in {1..3}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
 
   PYTHON_CONFIGURE_OPTS="--enable-framework" TMPDIR="$TMP" run_inline_definition <<OUT
 echo "PYTHON_CONFIGURE_OPTS_ARRAY=(\${PYTHON_CONFIGURE_OPTS_ARRAY[@]})"
@@ -274,7 +274,7 @@ EOS
 
 @test "enable universalsdk" {
   
-  for i in {1..3}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
   stub arch "echo x86_64"
 
   PYTHON_CONFIGURE_OPTS="--enable-universalsdk" TMPDIR="$TMP" run_inline_definition <<OUT
@@ -292,7 +292,7 @@ EOS
 
 @test "enable universalsdk on Apple Silicon" {
 
-  for i in {1..3}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
   stub arch "echo arm64"
 
   PYTHON_CONFIGURE_OPTS="--enable-universalsdk" TMPDIR="$TMP" run_inline_definition <<OUT
@@ -310,7 +310,7 @@ EOS
 
 @test "enable universalsdk with explicit archs argument" {
 
-  for i in {1..3}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
 
   PYTHON_CONFIGURE_OPTS="--enable-universalsdk --with-universal-archs=foo" TMPDIR="$TMP" run_inline_definition <<OUT
 echo "PYTHON_CONFIGURE_OPTS_ARRAY=(\${PYTHON_CONFIGURE_OPTS_ARRAY[@]})"
@@ -325,7 +325,7 @@ EOS
   cached_tarball "Python-3.6.2"
 
   for i in {1..4}; do stub brew false; done
-  for i in {1..8}; do stub uname '-s : echo Linux'; done
+  stub uname '-s : echo Linux'
   stub "$MAKE" \
     " : echo \"$MAKE \$@\" >> build.log" \
     " : echo \"$MAKE \$@\" >> build.log && cat build.log >> '$INSTALL_ROOT/build.log'"
@@ -346,7 +346,7 @@ OUT
 
 @test "default MACOSX_DEPLOYMENT_TARGET" {
   # yyuu/pyenv#257
-  for i in {1..3}; do stub uname '-s : echo Darwin'; done
+  stub uname '-s : echo Darwin'
   for i in {1..2}; do stub sw_vers '-productVersion : echo 10.10'; done
 
   TMPDIR="$TMP" run_inline_definition <<OUT