diff --git a/appveyor-test.py b/appveyor-test.py
index 2e4b4a4..befc8c1 100644
--- a/appveyor-test.py
+++ b/appveyor-test.py
@@ -308,9 +308,11 @@ class TestSetupForBuild(unittest.TestCase):
     platform = os.environ['PLATFORM']
     cc = os.environ['CMP']
     args = Namespace(paths=[])
+    do.building_base = True
 
     def setUp(self):
         os.environ.pop('EPICS_HOST_ARCH', None)
+        do.clear_lists()
 
     def tearDown(self):
         os.environ['CONFIGURATION'] = self.configuration
@@ -380,6 +382,39 @@ class TestSetupForBuild(unittest.TestCase):
         self.assertTrue(re.search('strawberry', os.environ['PATH'], flags=re.IGNORECASE),
                         'Strawberry Perl location not in PATH for vs2019')
 
+    def test_DetectionBase314No(self):
+        cfg_base_version = os.path.join('configure', 'CONFIG_BASE_VERSION')
+        fout = open(cfg_base_version, 'w')
+        print('BASE_3_14=NO', file=fout)
+        fout.close()
+        do.setup_for_build(self.args)
+        self.assertFalse(do.isbase314, 'Falsely detected Base 3.14')
+
+    def test_DetectionBase314Yes(self):
+        cfg_base_version = os.path.join('configure', 'CONFIG_BASE_VERSION')
+        fout = open(cfg_base_version, 'w')
+        print('BASE_3_14=YES', file=fout)
+        fout.close()
+        do.setup_for_build(self.args)
+        self.assertTrue(do.isbase314, 'Base 3.14 = YES not detected')
+
+    def test_DetectionTestResultsTargetNo(self):
+        rules_build = os.path.join('configure', 'RULES_BUILD')
+        fout = open(rules_build, 'w')
+        print('# test file for target detection', file=fout)
+        print('nottherighttarget:', file=fout)
+        fout.close()
+        do.setup_for_build(self.args)
+        self.assertFalse(do.has_test_results, 'Falsely detected test-results target')
+
+    def test_DetectionTestResultsTargetYes(self):
+        rules_build = os.path.join('configure', 'RULES_BUILD')
+        fout = open(rules_build, 'w')
+        print('# test file for target detection', file=fout)
+        print('test-results:', file=fout)
+        fout.close()
+        do.setup_for_build(self.args)
+        self.assertTrue(do.has_test_results, 'Target test-results not detected')
 
 if __name__ == "__main__":
     if 'VV' in os.environ and os.environ['VV'] == '1':
diff --git a/appveyor/do.py b/appveyor/do.py
index a5628b8..f9bc7ca 100644
--- a/appveyor/do.py
+++ b/appveyor/do.py
@@ -78,6 +78,7 @@ def modlist():
 zip7 = r'C:\Program Files\7-Zip\7z'
 make = ''
 isbase314 = False
+has_test_results = False
 silent_dep_builds = True
 
 def host_info():
@@ -99,10 +100,13 @@ def host_info():
 
 # Used from unittests
 def clear_lists():
+    global isbase314, has_test_results
     del seen_setups[:]
     del modules_to_compile[:]
     setup.clear()
     places.clear()
+    isbase314 = False
+    has_test_results = False
 
 # Error-handler to make shutil.rmtree delete read-only files on Windows
 def remove_readonly(func, path, excinfo):
@@ -357,7 +361,7 @@ def add_dependency(dep):
     update_release_local(setup[dep+"_VARNAME"], place)
 
 def setup_for_build(args):
-    global make, isbase314
+    global make, isbase314, has_test_results
     dllpaths = []
 
     # there is no combined static and debug EPICS_HOST_ARCH target,
@@ -415,6 +419,13 @@ def setup_for_build(args):
             if 'BASE_3_14=YES' in myfile.read():
                 isbase314 = True
 
+    rules_build = os.path.join(base_place, 'configure', 'RULES_BUILD')
+    if os.path.exists(rules_build):
+        with open(rules_build) as myfile:
+            for line in myfile:
+                if re.match('^test-results:', line):
+                    has_test_results = True
+
     bindir = os.path.join(os.getcwd(), 'bin', os.environ['EPICS_HOST_ARCH'])
     if os.path.isdir(bindir):
         dllpaths.append(bindir)
@@ -541,7 +552,8 @@ def test(args):
     setup_for_build(args)
     print('{0}Running the main module tests{1}'.format(ANSI_YELLOW, ANSI_RESET))
     call_make(['tapfiles'])
-    call_make(['test-results'], parallel=0, silent=True)
+    if has_test_results:
+        call_make(['test-results'], parallel=0, silent=True)
 
 def doExec(args):
     'exec user command with vcvars'
diff --git a/travis/build.sh b/travis/build.sh
index 326554f..395f0fa 100755
--- a/travis/build.sh
+++ b/travis/build.sh
@@ -37,7 +37,7 @@ if [ "$TEST" != "NO" ]
 then
   make -j2 tapfiles || ret=$?
 
-  make -sk test-results
+  grep -q "^test-results:" $EPICS_BASE/configure/RULES_BUILD && make -sk test-results
 fi
 
 exit $ret