diff --git a/moto/cognitoidp/models.py b/moto/cognitoidp/models.py
index 0b574504d..e8857f510 100644
--- a/moto/cognitoidp/models.py
+++ b/moto/cognitoidp/models.py
@@ -627,6 +627,10 @@ class CognitoIdpUserPool(BaseModel):
             _, logged_in_user = token_tuple
             if username == logged_in_user:
                 self.refresh_tokens[token] = None
+        for access_token, token_tuple in list(self.access_tokens.items()):
+            _, logged_in_user = token_tuple
+            if username == logged_in_user:
+                self.access_tokens.pop(access_token)
 
 
 class CognitoIdpUserPoolDomain(BaseModel):
diff --git a/tests/test_cognitoidp/test_cognitoidp.py b/tests/test_cognitoidp/test_cognitoidp.py
index 4962eae73..26785eb90 100644
--- a/tests/test_cognitoidp/test_cognitoidp.py
+++ b/tests/test_cognitoidp/test_cognitoidp.py
@@ -3212,6 +3212,12 @@ def test_global_sign_out():
     err["Code"].should.equal("NotAuthorizedException")
     err["Message"].should.equal("Refresh Token has been revoked")
 
+    with pytest.raises(ClientError) as ex:
+        conn.get_user(AccessToken=result["access_token"])
+
+    err = ex.value.response["Error"]
+    err["Code"].should.equal("NotAuthorizedException")
+
 
 @mock_cognitoidp
 def test_global_sign_out_unknown_accesstoken():