diff -Nru flexc++-2.11.00/debian/changelog flexc++-2.11.00/debian/changelog
--- flexc++-2.11.00/debian/changelog	2022-02-22 12:30:22.000000000 +0000
+++ flexc++-2.11.00/debian/changelog	2022-02-27 20:19:34.000000000 +0000
@@ -1,3 +1,9 @@
+flexc++ (2.11.00-2) unstable; urgency=medium
+
+  * Add autopkgtest that uses to flexc++ to create a basic scanner.
+
+ -- tony mancill <tmancill@debian.org>  Sun, 27 Feb 2022 12:19:34 -0800
+
 flexc++ (2.11.00-1) unstable; urgency=medium
 
   * Constructors of generated scanners have received a third parameter,
diff -Nru flexc++-2.11.00/debian/tests/control flexc++-2.11.00/debian/tests/control
--- flexc++-2.11.00/debian/tests/control	1970-01-01 00:00:00.000000000 +0000
+++ flexc++-2.11.00/debian/tests/control	2022-02-27 20:19:34.000000000 +0000
@@ -0,0 +1,3 @@
+Tests: run-unit-test
+Depends: @, bash, shunit2, g++, libbobcat-dev
+Restrictions: allow-stderr
diff -Nru flexc++-2.11.00/debian/tests/run-unit-test flexc++-2.11.00/debian/tests/run-unit-test
--- flexc++-2.11.00/debian/tests/run-unit-test	1970-01-01 00:00:00.000000000 +0000
+++ flexc++-2.11.00/debian/tests/run-unit-test	2022-02-27 20:19:34.000000000 +0000
@@ -0,0 +1,74 @@
+#!/bin/bash
+
+set -e
+exec 2>&1
+
+oneTimeSetUp() {
+    # very basic lexer
+    # see https://fbb-git.gitlab.io/flexcpp/manual/flexc++01.html#l4
+    cat > ${SHUNIT_TMPDIR}/lexer <<EOF1
+%%
+[_a-zA-Z][_a-zA-Z0-9]*		return 1;
+.|\n				// ignore
+EOF1
+
+    # driver for our lexer
+    cat > ${SHUNIT_TMPDIR}/testflex.cc <<EOF2
+#include <iostream>
+#include "Scanner.h"
+
+using namespace std;
+
+int main()
+{
+    Scanner scanner;
+    while (scanner.lex()) {
+        cout << scanner.matched() << " ";
+    }
+    cout << "\n";
+    return 0;
+}
+EOF2
+
+    # some input for our lexer
+    cat > ${SHUNIT_TMPDIR}/input <<EOF3
+a b c
+//
+01 2 3.14159
+#
+X YY ZZZ
+EOF3
+}
+
+#
+# test steps must run in order
+#
+
+test01GenerateScanner() {
+  cd ${SHUNIT_TMPDIR}
+  flexc++ ${SHUNIT_TMPDIR}/lexer
+
+  for f in lex.cc Scannerbase.h Scanner.h Scanner.ih
+  do
+    if [ ! -f "${SHUNIT_TMPDIR}/${f}" ]; then
+      fail "flexc++ output file missing: ${f}"
+    fi
+  done
+}
+
+test02Compilation() {
+  cd ${SHUNIT_TMPDIR}
+  g++ *.cc -lbobcat -o testflex
+
+  if [ ! -f "${SHUNIT_TMPDIR}/testflex" ]; then
+    fail "compilation of textflex failed"
+  fi
+}
+
+test03RunScanner() {
+  local OUT=$(${SHUNIT_TMPDIR}/testflex < ${SHUNIT_TMPDIR}/input)
+  assertNotSame "no output from scanner" "" "${OUT}"
+  assertSame "unexpected output from scanner" "a b c X YY ZZZ " "${OUT}"
+}
+
+. shunit2