diff --git a/irctest/client_tests/test_sasl.py b/irctest/client_tests/test_sasl.py
index 4f823e9..2a55203 100644
--- a/irctest/client_tests/test_sasl.py
+++ b/irctest/client_tests/test_sasl.py
@@ -15,7 +15,14 @@ IRX9cyi2wdYg9mUUYyh9GKdBCYHGUJAiCA==
 -----END EC PRIVATE KEY-----
 """
 
-class SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper):
+class SaslMechanismCheck:
+    def checkMechanismSupport(self, mechanism):
+        if mechanism in self.controller.supported_sasl_mechanisms:
+            return
+        self.skipTest('SASL Mechanism not supported: {}'.format(mechanism))
+
+class SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper,
+                   SaslMechanismCheck):
     def testPlain(self):
         auth = authentication.Authentication(
                 mechanisms=[authentication.Mechanisms.plain],
@@ -23,6 +30,7 @@ class SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper):
                 password='sesame',
                 )
         m = self.negotiateCapabilities(['sasl'], auth=auth)
+        self.checkMechanismSupport('PLAIN')
         self.assertEqual(m, Message([], None, 'AUTHENTICATE', ['PLAIN']))
         self.sendLine('AUTHENTICATE +')
         m = self.getMessage()
@@ -40,6 +48,7 @@ class SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper):
                 password='sesame',
                 )
         m = self.negotiateCapabilities(['sasl=EXTERNAL'], auth=auth)
+        self.checkMechanismSupport('PLAIN')
         self.assertEqual(self.acked_capabilities, {'sasl'})
         if m == Message([], None, 'CAP', ['END']):
             # IRCv3.2-style
@@ -59,6 +68,7 @@ class SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper):
         authstring = base64.b64encode(b'\x00'.join(
             [b'foo', b'foo', b'bar'*200])).decode()
         m = self.negotiateCapabilities(['sasl'], auth=auth)
+        self.checkMechanismSupport('PLAIN')
         self.assertEqual(m, Message([], None, 'AUTHENTICATE', ['PLAIN']))
         self.sendLine('AUTHENTICATE +')
         m = self.getMessage()
@@ -85,6 +95,7 @@ class SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper):
         authstring = base64.b64encode(b'\x00'.join(
             [b'foo', b'foo', b'quux'*148])).decode()
         m = self.negotiateCapabilities(['sasl'], auth=auth)
+        self.checkMechanismSupport('PLAIN')
         self.assertEqual(m, Message([], None, 'AUTHENTICATE', ['PLAIN']))
         self.sendLine('AUTHENTICATE +')
         m = self.getMessage()
@@ -108,6 +119,7 @@ class SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper):
                 ecdsa_key=ECDSA_KEY,
                 )
         m = self.negotiateCapabilities(['sasl'], auth=auth)
+        self.checkMechanismSupport('ECDSA-NIST256P-CHALLENGE')
         self.assertEqual(m, Message([], None, 'AUTHENTICATE', ['ECDSA-NIST256P-CHALLENGE']))
         self.sendLine('AUTHENTICATE +')
         m = self.getMessage()
@@ -128,7 +140,8 @@ class SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper):
         m = self.negotiateCapabilities(['sasl'], False)
         self.assertEqual(m, Message([], None, 'CAP', ['END']))
 
-class Irc302SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper):
+class Irc302SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper,
+                         SaslMechanismCheck):
     def testPlainNotAvailable(self):
         auth = authentication.Authentication(
                 mechanisms=[authentication.Mechanisms.plain],
@@ -136,5 +149,6 @@ class Irc302SaslTestCase(cases.BaseClientTestCase, cases.ClientNegociationHelper
                 password='sesame',
                 )
         m = self.negotiateCapabilities(['sasl=EXTERNAL'], auth=auth)
+        self.checkMechanismSupport('PLAIN')
         self.assertEqual(self.acked_capabilities, {'sasl'})
         self.assertEqual(m, Message([], None, 'CAP', ['END']))
diff --git a/irctest/controllers/limnoria.py b/irctest/controllers/limnoria.py
index 1b096ab..ca01b9e 100644
--- a/irctest/controllers/limnoria.py
+++ b/irctest/controllers/limnoria.py
@@ -23,6 +23,8 @@ class LimnoriaController(BaseClientController, DirectoryBasedController):
             pass
         with self.open_file('conf/users.conf'):
             pass
+        self.supported_sasl_mechanisms = [
+            'PLAIN', 'ECDSA-NIST256P-CHALLENGE', 'EXTERNAL']
 
     def run(self, hostname, port, auth):
         # Runs a client with the config given as arguments
diff --git a/irctest/controllers/sopel.py b/irctest/controllers/sopel.py
index de30383..280d55a 100644
--- a/irctest/controllers/sopel.py
+++ b/irctest/controllers/sopel.py
@@ -22,6 +22,7 @@ class SopelController(BaseClientController):
         super().__init__()
         self.filename = next(tempfile._get_candidate_names()) + '.cfg'
         self.proc = None
+        self.supported_sasl_mechanisms = ['PLAIN']
     def kill(self):
         if self.proc:
             self.proc.kill()