diff --git a/tests/nightly.sh b/tests/nightly.sh
new file mode 100755
index 0000000000..b2c226faf4
--- /dev/null
+++ b/tests/nightly.sh
@@ -0,0 +1,83 @@
+#!/bin/bash
+
+# Copyright (c) 2021 The Regents of the University of California
+# All Rights Reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -e
+set -x
+
+dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+gem5_root="${dir}/.."
+
+# We assume the lone argument is the number of threads. If no argument is
+# given we default to one.
+threads=1
+if [[ $# -gt 0 ]]; then
+    threads=$1
+fi
+
+build_target () {
+    isa=$1
+
+    # Try to build. If not, delete the build directory and try again.
+    # SCons is not perfect, and occasionally does not catch a necessary
+    # compilation: https://gem5.atlassian.net/browse/GEM5-753
+    docker run -u $UID:$GID --volume "${gem5_root}":"${gem5_root}" -w \
+        "${gem5_root}" --rm gcr.io/gem5-test/ubuntu-20.04_all-dependencies \
+            bash -c "scons build/${isa}/gem5.opt -j${threads} \
+                || (rm -rf build && scons build/${isa}/gem5.opt -j${threads})"
+}
+
+unit_test () {
+    build=$1
+
+    docker run -u $UID:$GID --volume "${gem5_root}":"${gem5_root}" -w \
+        "${gem5_root}" --rm gcr.io/gem5-test/ubuntu-20.04_all-dependencies \
+            scons build/NULL/unittests.${build} -j${threads}
+}
+
+# Ensure we have the latest docker images.
+docker pull gcr.io/gem5-test/ubuntu-20.04_all-dependencies
+
+# Try to build the ISA targets.
+build_target NULL
+build_target RISCV
+build_target X86
+build_target ARM
+build_target SPARC
+build_target MIPS
+build_target POWER
+
+# Run the unit tests.
+unit_test opt
+unit_test debug
+unit_test perf
+unit_test prof
+
+# Run the gem5 long tests.
+docker run -u $UID:$GID --volume "${gem5_root}":"${gem5_root}" -w \
+    "${gem5_root}"/tests --rm gcr.io/gem5-test/ubuntu-20.04_all-dependencies \
+        ./main.py run --length long -j${threads} -t${threads}
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