diff --git a/.ci/monolithic-linux.sh b/.ci/monolithic-linux.sh
index da21e09809aee..b9afc7a57b21c 100755
--- a/.ci/monolithic-linux.sh
+++ b/.ci/monolithic-linux.sh
@@ -13,50 +13,15 @@
 # run only the relevant tests.
 #
 
-set -ex
-set -o pipefail
+source .ci/utils.sh
 
-MONOREPO_ROOT="${MONOREPO_ROOT:="$(git rev-parse --show-toplevel)"}"
-BUILD_DIR="${BUILD_DIR:=${MONOREPO_ROOT}/build}"
 INSTALL_DIR="${BUILD_DIR}/install"
-rm -rf "${BUILD_DIR}"
-
-sccache --zero-stats
 
 mkdir -p artifacts/reproducers
 
-# Make sure any clang reproducers will end up as artifacts.
+# Make sure any clang reproducers will end up as artifacts
 export CLANG_CRASH_DIAGNOSTICS_DIR=`realpath artifacts/reproducers`
 
-function at-exit {
-  retcode=$?
-
-  sccache --show-stats > artifacts/sccache_stats.txt
-  cp "${BUILD_DIR}"/.ninja_log artifacts/.ninja_log
-  cp "${BUILD_DIR}"/test-results.*.xml artifacts/ || :
-
-  # If building fails there will be no results files.
-  shopt -s nullglob
-  
-  if [[ "$GITHUB_STEP_SUMMARY" != "" ]]; then
-    python3 "${MONOREPO_ROOT}"/.ci/generate_test_report_github.py \
-      $retcode "${BUILD_DIR}"/test-results.*.xml >> $GITHUB_STEP_SUMMARY
-  fi
-}
-trap at-exit EXIT
-
-function start-group {
-  groupname=$1
-  if [[ "$GITHUB_ACTIONS" != "" ]]; then
-    echo "::endgroup"
-    echo "::group::$groupname"
-  elif [[ "$POSTCOMMIT_CI" != "" ]]; then
-    echo "@@@$STEP@@@"
-  else
-    echo "Starting $groupname"
-  fi
-}
-
 projects="${1}"
 targets="${2}"
 runtimes="${3}"
diff --git a/.ci/monolithic-windows.sh b/.ci/monolithic-windows.sh
index 71646ce047d4f..2e81e27bd7d0f 100755
--- a/.ci/monolithic-windows.sh
+++ b/.ci/monolithic-windows.sh
@@ -13,44 +13,7 @@
 # run only the relevant tests.
 #
 
-set -ex
-set -o pipefail
-
-MONOREPO_ROOT="${MONOREPO_ROOT:="$(git rev-parse --show-toplevel)"}"
-BUILD_DIR="${BUILD_DIR:=${MONOREPO_ROOT}/build}"
-
-rm -rf "${BUILD_DIR}"
-
-sccache --zero-stats
-function at-exit {
-  retcode=$?
-
-  mkdir -p artifacts
-  sccache --show-stats >> artifacts/sccache_stats.txt
-  cp "${BUILD_DIR}"/.ninja_log artifacts/.ninja_log
-  cp "${BUILD_DIR}"/test-results.*.xml artifacts/ || :
-
-  # If building fails there will be no results files.
-  shopt -s nullglob
-
-  if [[ "$GITHUB_STEP_SUMMARY" != "" ]]; then
-    python "${MONOREPO_ROOT}"/.ci/generate_test_report_github.py \
-      $retcode "${BUILD_DIR}"/test-results.*.xml >> $GITHUB_STEP_SUMMARY
-  fi
-}
-trap at-exit EXIT
-
-function start-group {
-  groupname=$1
-  if [[ "$GITHUB_ACTIONS" != "" ]]; then
-    echo "::endgroup"
-    echo "::group::$groupname"
-  elif [[ "$POSTCOMMIT_CI" != "" ]]; then
-    echo "@@@$STEP@@@"
-  else
-    echo "Starting $groupname"
-  fi
-}
+source .ci/utils.sh
 
 projects="${1}"
 targets="${2}"
diff --git a/.ci/utils.sh b/.ci/utils.sh
new file mode 100644
index 0000000000000..6656ffe06666a
--- /dev/null
+++ b/.ci/utils.sh
@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+#===----------------------------------------------------------------------===##
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+#===----------------------------------------------------------------------===##
+
+# This script performs some setup and contains some utilities used for in the
+# monolithic-linux.sh and monolithic-windows.sh scripts.
+
+set -ex
+set -o pipefail
+
+MONOREPO_ROOT="${MONOREPO_ROOT:="$(git rev-parse --show-toplevel)"}"
+BUILD_DIR="${BUILD_DIR:=${MONOREPO_ROOT}/build}"
+
+rm -rf "${BUILD_DIR}"
+
+sccache --zero-stats
+
+function at-exit {
+  retcode=$?
+
+  mkdir -p artifacts
+  sccache --show-stats >> artifacts/sccache_stats.txt
+  cp "${BUILD_DIR}"/.ninja_log artifacts/.ninja_log
+  cp "${BUILD_DIR}"/test-results.*.xml artifacts/ || :
+
+  # If building fails there will be no results files.
+  shopt -s nullglob
+
+  if [[ "$GITHUB_STEP_SUMMARY" != "" ]]; then
+    python "${MONOREPO_ROOT}"/.ci/generate_test_report_github.py \
+      $retcode "${BUILD_DIR}"/test-results.*.xml >> $GITHUB_STEP_SUMMARY
+  fi
+}
+trap at-exit EXIT
+
+function start-group {
+  groupname=$1
+  if [[ "$GITHUB_ACTIONS" != "" ]]; then
+    echo "::endgroup"
+    echo "::group::$groupname"
+  elif [[ "$POSTCOMMIT_CI" != "" ]]; then
+    echo "@@@$STEP@@@"
+  else
+    echo "Starting $groupname"
+  fi
+}