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diff --git a/share/spack/qa/completion-test.sh b/share/spack/qa/completion-test.sh
new file mode 100755
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+++ b/share/spack/qa/completion-test.sh
@@ -0,0 +1,89 @@
+#!/bin/sh
+#
+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+#
+# This script tests that Spack's tab completion scripts work.
+#
+# The tests are portable to bash, zsh, and bourne shell, and can be run
+# in any of these shells.
+#
+
+export QA_DIR=$(dirname "$0")
+export SHARE_DIR=$(cd "$QA_DIR/.." && pwd)
+export SPACK_ROOT=$(cd "$QA_DIR/../../.." && pwd)
+
+. "$QA_DIR/test-framework.sh"
+
+# Fail on undefined variables
+set -u
+
+# Source setup-env.sh before tests
+. "$SHARE_DIR/setup-env.sh"
+. "$SHARE_DIR/spack-completion.$_sp_shell"
+
+title "Testing spack-completion.$_sp_shell with $_sp_shell"
+
+# Spack command is now available
+succeeds which spack
+
+title 'Testing all subcommands'
+while IFS= read -r line
+do
+    # Test that completion with no args works
+    succeeds _spack_completions ${line[*]} ''
+
+    # Test that completion with flags works
+    contains '-h --help' _spack_completions ${line[*]} -
+done <<- EOF
+    $(spack commands --aliases --format=subcommands)
+EOF
+
+title 'Testing for correct output'
+contains 'compiler' _spack_completions spack ''
+contains 'install' _spack_completions spack inst
+contains 'find' _spack_completions spack help ''
+contains 'hdf5' _spack_completions spack list ''
+contains 'py-numpy' _spack_completions spack list py-
+contains 'mpi' _spack_completions spack providers ''
+contains 'builtin' _spack_completions spack repo remove ''
+contains 'packages' _spack_completions spack config edit ''
+contains 'python' _spack_completions spack extensions ''
+contains 'hdf5' _spack_completions spack -d install --jobs 8 ''
+contains 'hdf5' _spack_completions spack install -v ''
+
+# XFAIL: Fails for Python 2.6 because pkg_resources not found?
+#contains 'compilers.py' _spack_completions spack test ''
+
+title 'Testing debugging functions'
+
+# This is a particularly tricky case that involves the following situation:
+#     `spack -d [] install `
+# Here, [] represents the cursor, which is in the middle of the line.
+# We should tab-complete optional flags for `spack`, not optional flags for
+# `spack install` or package names.
+COMP_LINE='spack -d  install '
+COMP_POINT=9
+COMP_WORDS=(spack -d install)
+COMP_CWORD=2
+COMP_KEY=9
+COMP_TYPE=64
+
+_bash_completion_spack
+contains "--all-help" echo "${COMPREPLY[@]}"
+
+contains "['spack', '-d', 'install', '']" _pretty_print COMP_WORDS[@]
+
+# Set the rest of the intermediate variables manually
+COMP_WORDS_NO_FLAGS=(spack install)
+COMP_CWORD_NO_FLAGS=1
+subfunction=_spack
+cur=
+
+list_options=true
+contains "'True'" _test_vars
+list_options=false
+contains "'False'" _test_vars