diff --git a/tests/letstest/scripts/bootstrap_os_packages.sh b/tests/letstest/scripts/bootstrap_os_packages.sh
index 6f4444cdc..a38e8a4ec 100644
--- a/tests/letstest/scripts/bootstrap_os_packages.sh
+++ b/tests/letstest/scripts/bootstrap_os_packages.sh
@@ -8,122 +8,38 @@ error() {
     echo "$@"
 }
 
-MIN_PYTHON_2_VERSION="2.7"
-MIN_PYVER2=$(echo "$MIN_PYTHON_2_VERSION" | sed 's/\.//')
-MIN_PYTHON_3_VERSION="3.5"
-MIN_PYVER3=$(echo "$MIN_PYTHON_3_VERSION" | sed 's/\.//')
 # Sets LE_PYTHON to Python version string and PYVER to the first two
 # digits of the python version.
-# MIN_PYVER and MIN_PYTHON_VERSION are also set by this function, and their
-# values depend on if we try to use Python 3 or Python 2.
 DeterminePythonVersion() {
-  # Arguments: "NOCRASH" if we shouldn't crash if we don't find a good python
-  #
   # If no Python is found, PYVER is set to 0.
-  if [ "$USE_PYTHON_3" = 1 ]; then
-    MIN_PYVER=$MIN_PYVER3
-    MIN_PYTHON_VERSION=$MIN_PYTHON_3_VERSION
-    for LE_PYTHON in "$LE_PYTHON" python3; do
-      # Break (while keeping the LE_PYTHON value) if found.
-      $EXISTS "$LE_PYTHON" > /dev/null && break
-    done
-  else
-    MIN_PYVER=$MIN_PYVER2
-    MIN_PYTHON_VERSION=$MIN_PYTHON_2_VERSION
-    for LE_PYTHON in "$LE_PYTHON" python2.7 python27 python2 python; do
-      # Break (while keeping the LE_PYTHON value) if found.
-      $EXISTS "$LE_PYTHON" > /dev/null && break
-    done
-  fi
-  if [ "$?" != "0" ]; then
-    if [ "$1" != "NOCRASH" ]; then
-      error "Cannot find any Pythons; please install one!"
-      exit 1
-    else
-      PYVER=0
-      return 0
-    fi
-  fi
+  for LE_PYTHON in "$LE_PYTHON" python3; do
+    # Break (while keeping the LE_PYTHON value) if found.
+    $EXISTS "$LE_PYTHON" > /dev/null && break
+  done
 
   PYVER=$("$LE_PYTHON" -V 2>&1 | cut -d" " -f 2 | cut -d. -f1,2 | sed 's/\.//')
-  if [ "$PYVER" -lt "$MIN_PYVER" ]; then
-    if [ "$1" != "NOCRASH" ]; then
-      error "You have an ancient version of Python entombed in your operating system..."
-      error "This isn't going to work; you'll need at least version $MIN_PYTHON_VERSION."
-      exit 1
-    fi
-  fi
 }
 
 BootstrapDebCommon() {
-  # Current version tested with:
-  #
-  # - Ubuntu
-  #     - 14.04 (x64)
-  #     - 15.04 (x64)
-  # - Debian
-  #     - 7.9 "wheezy" (x64)
-  #     - sid (2015-10-21) (x64)
+  apt-get update || error apt-get update hit problems but continuing anyway...
 
-  # Past versions tested with:
-  #
-  # - Debian 8.0 "jessie" (x64)
-  # - Raspbian 7.8 (armhf)
-
-  # Believed not to work:
-  #
-  # - Debian 6.0.10 "squeeze" (x64)
-
-  if [ "$QUIET" = 1 ]; then
-    QUIET_FLAG='-qq'
-  fi
-
-  apt-get $QUIET_FLAG update || error apt-get update hit problems but continuing anyway...
-
-  # virtualenv binary can be found in different packages depending on
-  # distro version (#346)
-
-  virtualenv=
-  # virtual env is known to apt and is installable
-  if apt-cache show virtualenv > /dev/null 2>&1 ; then
-    if ! LC_ALL=C apt-cache --quiet=0 show virtualenv 2>&1 | grep -q 'No packages found'; then
-      virtualenv="virtualenv"
-    fi
-  fi
-
-  if apt-cache show python-virtualenv > /dev/null 2>&1; then
-    virtualenv="$virtualenv python-virtualenv"
-  fi
-
-  augeas_pkg="libaugeas0 augeas-lenses"
-
-  if [ "$ASSUME_YES" = 1 ]; then
-    YES_FLAG="-y"
-  fi
-
-  apt-get install $QUIET_FLAG $YES_FLAG --no-install-recommends \
-    python \
-    python-dev \
-    $virtualenv \
+  apt-get install -y --no-install-recommends \
+    python3 \
+    python3-dev \
+    python3-venv \
     gcc \
-    $augeas_pkg \
+    libaugeas0 \
     libssl-dev \
     openssl \
     libffi-dev \
     ca-certificates \
 
-
-  if ! $EXISTS virtualenv > /dev/null ; then
-    error Failed to install a working \"virtualenv\" command, exiting
-    exit 1
-  fi
 }
 
 # If new packages are installed by BootstrapRpmCommonBase below, version
 # numbers in rpm_common.sh and rpm_python3.sh must be increased.
 
 # Sets TOOL to the name of the package manager
-# Sets appropriate values for YES_FLAG and QUIET_FLAG based on $ASSUME_YES and $QUIET_FLAG.
 # Note: this function is called both while selecting the bootstrap scripts and
 # during the actual bootstrap. Some things like prompting to user can be done in the latter
 # case, but not in the former one.
@@ -140,12 +56,6 @@ InitializeRPMCommonBase() {
     exit 1
   fi
 
-  if [ "$ASSUME_YES" = 1 ]; then
-    YES_FLAG="-y"
-  fi
-  if [ "$QUIET" = 1 ]; then
-    QUIET_FLAG='--quiet'
-  fi
 }
 
 BootstrapRpmCommonBase() {
@@ -174,75 +84,12 @@ BootstrapRpmCommonBase() {
     "
   fi
 
-  if ! $TOOL install $YES_FLAG $QUIET_FLAG $pkgs; then
+  if ! $TOOL install -y $pkgs; then
     error "Could not install OS dependencies. Aborting bootstrap!"
     exit 1
   fi
 }
 
-# If new packages are installed by BootstrapRpmCommon below, this version
-# number must be increased.
-BOOTSTRAP_RPM_COMMON_VERSION=1
-
-BootstrapRpmCommon() {
-  # Tested with:
-  #   - Fedora 20, 21, 22, 23 (x64)
-  #   - Centos 7 (x64: on DigitalOcean droplet)
-  #   - CentOS 7 Minimal install in a Hyper-V VM
-  #   - CentOS 6
-
-  InitializeRPMCommonBase
-
-  # Most RPM distros use the "python" or "python-" naming convention.  Let's try that first.
-  if $TOOL list python >/dev/null 2>&1; then
-    python_pkgs="$python
-      python-devel
-      python-virtualenv
-      python-tools
-      python-pip
-    "
-  # Fedora 26 starts to use the prefix python2 for python2 based packages.
-  # this elseif is theoretically for any Fedora over version 26:
-  elif $TOOL list python2 >/dev/null 2>&1; then
-    python_pkgs="$python2
-      python2-libs
-      python2-setuptools
-      python2-devel
-      python2-virtualenv
-      python2-tools
-      python2-pip
-    "
-  # Some distros and older versions of current distros use a "python27"
-  # instead of the "python" or "python-" naming convention.
-  else
-    python_pkgs="$python27
-      python27-devel
-      python27-virtualenv
-      python27-tools
-      python27-pip
-    "
-  fi
-
-  BootstrapRpmCommonBase "$python_pkgs"
-}
-
-# If new packages are installed by BootstrapRpmPython3 below, this version
-# number must be increased.
-BOOTSTRAP_RPM_PYTHON3_LEGACY_VERSION=1
-
-# Checks if rh-python36 can be installed.
-Python36SclIsAvailable() {
-  InitializeRPMCommonBase >/dev/null 2>&1;
-
-  if "${TOOL}" list rh-python36 >/dev/null 2>&1; then
-    return 0
-  fi
-  if "${TOOL}" list centos-release-scl >/dev/null 2>&1; then
-    return 0
-  fi
-  return 1
-}
-
 # Try to enable rh-python36 from SCL if it is necessary and possible.
 EnablePython36SCL() {
   if "$EXISTS" python3.6 > /dev/null 2> /dev/null; then
@@ -274,15 +121,7 @@ BootstrapRpmPython3Legacy() {
       error "Enable the SCL repository and try running Certbot again."
       exit 1
     fi
-    if [ "${ASSUME_YES}" = 1 ]; then
-      /bin/echo -n "Enabling the SCL repository in 3 seconds... (Press Ctrl-C to cancel)"
-      sleep 1s
-      /bin/echo -ne "\e[0K\rEnabling the SCL repository in 2 seconds... (Press Ctrl-C to cancel)"
-      sleep 1s
-      /bin/echo -e "\e[0K\rEnabling the SCL repository in 1 second... (Press Ctrl-C to cancel)"
-      sleep 1s
-    fi
-    if ! "${TOOL}" install "${YES_FLAG}" "${QUIET_FLAG}" centos-release-scl; then
+    if ! "${TOOL}" install -y centos-release-scl; then
       error "Could not enable SCL. Aborting bootstrap!"
       exit 1
     fi
@@ -305,10 +144,6 @@ BootstrapRpmPython3Legacy() {
   EnablePython36SCL
 }
 
-# If new packages are installed by BootstrapRpmPython3 below, this version
-# number must be increased.
-BOOTSTRAP_RPM_PYTHON3_VERSION=1
-
 BootstrapRpmPython3() {
   # Tested with:
   #   - Fedora 29
@@ -332,74 +167,23 @@ BootstrapRpmPython3() {
 # Set Bootstrap to the function that installs OS dependencies on this system.
 if [ -f /etc/debian_version ]; then
   Bootstrap() {
-    BootstrapMessage "Debian-based OSes"
     BootstrapDebCommon
   }
 elif [ -f /etc/redhat-release ]; then
-  # Run DeterminePythonVersion to decide on the basis of available Python versions
-  # whether to use 2.x or 3.x on RedHat-like systems.
-  # Then, revert LE_PYTHON to its previous state.
-  prev_le_python="$LE_PYTHON"
-  unset LE_PYTHON
-  DeterminePythonVersion "NOCRASH"
-
-  RPM_DIST_NAME=`(. /etc/os-release 2> /dev/null && echo $ID) || echo "unknown"`
-
-  # Set RPM_DIST_VERSION to VERSION_ID from /etc/os-release after splitting on
-  # '.' characters (e.g. "8.0" becomes "8"). If the command exits with an
-  # error, RPM_DIST_VERSION is set to "unknown".
-  RPM_DIST_VERSION=$( (. /etc/os-release 2> /dev/null && echo "$VERSION_ID") | cut -d '.' -f1 || echo "unknown")
-
-  # If RPM_DIST_VERSION is an empty string or it contains any nonnumeric
-  # characters, the value is unexpected so we set RPM_DIST_VERSION to 0.
-  if [ -z "$RPM_DIST_VERSION" ] || [ -n "$(echo "$RPM_DIST_VERSION" | tr -d '[0-9]')" ]; then
-     RPM_DIST_VERSION=0
-  fi
-
   # Handle legacy RPM distributions
   if [ "$PYVER" -eq 26 ]; then
-    # Check if an automated bootstrap can be achieved on this system.
-    if ! Python36SclIsAvailable; then
-      INTERACTIVE_BOOTSTRAP=1
-    fi
-
     Bootstrap() {
-      BootstrapMessage "Legacy RedHat-based OSes that will use Python3"
       BootstrapRpmPython3Legacy
     }
-    USE_PYTHON_3=1
-
     # Try now to enable SCL rh-python36 for systems already bootstrapped
     # NB: EnablePython36SCL has been defined along with BootstrapRpmPython3Legacy in certbot-auto
     EnablePython36SCL
   else
-    # Starting to Fedora 29, python2 is on a deprecation path. Let's move to python3 then.
-    # RHEL 8 also uses python3 by default.
-    if [ "$RPM_DIST_NAME" = "fedora" -a "$RPM_DIST_VERSION" -ge 29 ]; then
-      RPM_USE_PYTHON_3=1
-    elif [ "$RPM_DIST_NAME" = "rhel" -a "$RPM_DIST_VERSION" -ge 8 ]; then
-      RPM_USE_PYTHON_3=1
-    elif [ "$RPM_DIST_NAME" = "centos" -a "$RPM_DIST_VERSION" -ge 8 ]; then
-      RPM_USE_PYTHON_3=1
-    else
-      RPM_USE_PYTHON_3=0
-    fi
-
-    if [ "$RPM_USE_PYTHON_3" = 1 ]; then
-      Bootstrap() {
-        BootstrapMessage "RedHat-based OSes that will use Python3"
-        BootstrapRpmPython3
-      }
-      USE_PYTHON_3=1
-    else
-      Bootstrap() {
-        BootstrapMessage "RedHat-based OSes"
-        BootstrapRpmCommon
-      }
-    fi
+    Bootstrap() {
+      BootstrapRpmPython3
+    }
   fi
 
-  LE_PYTHON="$prev_le_python"
 fi
 
 Bootstrap