diff --git a/admin-tools/check-2.4-2.7-versions.sh b/admin-tools/check-2.4-2.7-versions.sh
index 2e3fe1bb..df4649f5 100755
--- a/admin-tools/check-2.4-2.7-versions.sh
+++ b/admin-tools/check-2.4-2.7-versions.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# Run tests over all Python versions in branch python-2.4-2.7
 set -e
 function finish {
   cd $owd
@@ -11,7 +12,9 @@ if ! source ./pyenv-2.4-2.7-versions ; then
     exit $?
 fi
 if ! source ./setup-python-2.4.sh ; then
-    exit $?
+    rc=$?
+    finish
+    exit $rc
 fi
 
 cd ..
@@ -22,6 +25,8 @@ for version in $PYVERSIONS; do
     fi
     make clean && python setup.py develop
     if ! make check ; then
+	finish
+	rc=$?
 	exit $?
     fi
     echo === $version ===
diff --git a/admin-tools/check-3.3-3.5-versions.sh b/admin-tools/check-3.3-3.5-versions.sh
index 5b451577..99fb08fa 100644
--- a/admin-tools/check-3.3-3.5-versions.sh
+++ b/admin-tools/check-3.3-3.5-versions.sh
@@ -1,4 +1,6 @@
 #!/bin/bash
+# Run tests over all Python versions in branch python-3.3-3.5
+set -e
 function finish {
   cd $owd
 }
@@ -25,3 +27,4 @@ for version in $PYVERSIONS; do
     fi
     echo === $version ===
 done
+finish
diff --git a/admin-tools/setup-master.sh b/admin-tools/setup-master.sh
index 706e81fd..bd4e4ee8 100755
--- a/admin-tools/setup-master.sh
+++ b/admin-tools/setup-master.sh
@@ -1,6 +1,14 @@
 #!/bin/bash
+# Check out master branch and dependent development master branches
+set -e
 PYTHON_VERSION=3.8.18
 
+bs=${BASH_SOURCE[0]}
+if [[ $0 == $bs ]] ; then
+    echo "This script should be *sourced* rather than run directly through bash"
+    exit 1
+fi
+
 function checkout_version {
     local repo=$1
     version=${2:-master}
@@ -14,18 +22,17 @@ function checkout_version {
 function finish {
   cd $owd
 }
-
-export PATH=$HOME/.pyenv/bin/pyenv:$PATH
 owd=$(pwd)
-bs=${BASH_SOURCE[0]}
-if [[ $0 == $bs ]] ; then
-    echo "This script should be *sourced* rather than run directly through bash"
-    exit 1
-fi
+trap finish EXIT
+
+export PATH=$HOME/.pyenv/bin/pyenv:$PATHb
+
 mydir=$(dirname $bs)
 fulldir=$(readlink -f $mydir)
 cd $fulldir/..
 (cd $fulldir/.. && checkout_version python-spark && checkout_version python-xdis &&
-      checkout_version python-uncompyle6)
-cd $owd
-rm -v */.python-version >/dev/null 2>&1 || true
+     checkout_version python-uncompyle6)
+
+git pull
+rm -v */.python-version || true
+finish
diff --git a/admin-tools/setup-python-2.4.sh b/admin-tools/setup-python-2.4.sh
index 2f56cba1..5b9430b9 100755
--- a/admin-tools/setup-python-2.4.sh
+++ b/admin-tools/setup-python-2.4.sh
@@ -1,10 +1,19 @@
 #!/bin/bash
+# Check out python-2.4-to-2.7 and dependent development branches.
+
+set -e
 PYTHON_VERSION=2.4.6
 
+bs=${BASH_SOURCE[0]}
+if [[ $0 == $bs ]] ; then
+    echo "This script should be *sourced* rather than run directly through bash"
+    exit 1
+fi
+
 function checkout_version {
     local repo=$1
-    version=${2:-python-2.4}
-    echo Checking out $version.4 on $repo ...
+    version=${2:-python-2.4-to-2.7}
+    echo Checking out $version on $repo ...
     (cd ../$repo && git checkout $version && pyenv local $PYTHON_VERSION) && \
 	git pull
     return $?
@@ -13,16 +22,16 @@ function checkout_version {
 function finish {
   cd $owd
 }
-
 owd=$(pwd)
-bs=${BASH_SOURCE[0]}
-if [[ $0 == $bs ]] ; then
-    echo "This script should be *sourced* rather than run directly through bash"
-    exit 1
-fi
+trap finish EXIT
+
+export PATH=$HOME/.pyenv/bin/pyenv:$PATH
+
 mydir=$(dirname $bs)
 fulldir=$(readlink -f $mydir)
 (cd $fulldir/.. && checkout_version python-spark && checkout_version python-xdis python-2.4-to-2.7 &&
-      checkout_version python-uncompyle6)
+     checkout_version python-uncompyle6)
+
+git pull
 rm -v */.python-version || true
 finish
diff --git a/admin-tools/setup-python-3.0.sh b/admin-tools/setup-python-3.0.sh
index 8a2cfaf5..5e61da11 100644
--- a/admin-tools/setup-python-3.0.sh
+++ b/admin-tools/setup-python-3.0.sh
@@ -1,7 +1,14 @@
 #!/bin/bash
+# Check out python-3.0-to-3.2 and dependent development branches.
+
 set -e
 PYTHON_VERSION=3.0.1
-pyenv local $PYTHON_VERSION
+
+bs=${BASH_SOURCE[0]}
+if [[ $0 == $bs ]] ; then
+    echo "This script should be *sourced* rather than run directly through bash"
+    exit 1
+fi
 
 # FIXME put some of the below in a common routine
 function checkout_version {
@@ -16,14 +23,10 @@ function checkout_version {
 function finish {
   cd $owd
 }
+owd=$(pwd)
+trap finish EXIT
 
 export PATH=$HOME/.pyenv/bin/pyenv:$PATH
-owd=$(pwd)
-bs=${BASH_SOURCE[0]}
-if [[ $0 == $bs ]] ; then
-    echo "This script should be *sourced* rather than run directly through bash"
-    exit 1
-fi
 
 mydir=$(dirname $bs)
 fulldir=$(readlink -f $mydir)
@@ -31,6 +34,6 @@ cd $fulldir/..
 (cd $fulldir/.. && checkout_version python-spark master && checkout_version python-xdis &&
       checkout_version python-uncompyle6)
 
-git checkout python-3.0-to-3.2  && git pull && pyenv local $PYTHON_VERSION
+git pull
 rm -v */.python-version || true
 finish
diff --git a/admin-tools/setup-python-3.3.sh b/admin-tools/setup-python-3.3.sh
index 5125c31b..821ca59a 100755
--- a/admin-tools/setup-python-3.3.sh
+++ b/admin-tools/setup-python-3.3.sh
@@ -1,7 +1,13 @@
 #!/bin/bash
+# Check out python-3.3-to-3.5 and dependent development branches.
 set -e
 PYTHON_VERSION=3.3.7
-pyenv local $PYTHON_VERSION
+
+bs=${BASH_SOURCE[0]}
+if [[ $0 == $bs ]] ; then
+    echo "This script should be *sourced* rather than run directly through bash"
+    exit 1
+fi
 
 # FIXME put some of the below in a common routine
 function checkout_version {
@@ -16,22 +22,17 @@ function checkout_version {
 function finish {
   cd $owd
 }
+owd=$(pwd)
+trap finish EXIT
 
 export PATH=$HOME/.pyenv/bin/pyenv:$PATH
-owd=$(pwd)
-bs=${BASH_SOURCE[0]}
-if [[ $0 == $bs ]] ; then
-    echo "This script should be *sourced* rather than run directly through bash"
-    exit 1
-fi
 
-mydir=$(dirname $bs)
 fulldir=$(readlink -f $mydir)
 cd $fulldir/..
 (cd $fulldir/.. && checkout_version python-spark master && checkout_version python-xdis &&
      checkout_version python-uncompyle6)
 rm -v */.python-version || true
 
-git checkout python-3.3-to-3.5  && git pull && pyenv local $PYTHON_VERSION
+git pull
 rm -v */.python-version || true
 finish