diff --git a/moto/resourcegroupstaggingapi/models.py b/moto/resourcegroupstaggingapi/models.py
index b384042f6112..19dc9339a8f7 100644
--- a/moto/resourcegroupstaggingapi/models.py
+++ b/moto/resourcegroupstaggingapi/models.py
@@ -591,7 +591,9 @@ def format_tag_keys(
             not resource_type_filters or "workspaces-web" in resource_type_filters
         ):
             for portal in self.workspacesweb_backends.portals.values():
-                tags = format_tag_keys(portal.tags, ["Key", "Value"])  # type: ignore
+                tags = self.workspacesweb_backends.tagger.list_tags_for_resource(
+                    portal.arn
+                )["Tags"]
                 if not tags or not tag_filter(tags):
                     continue
                 yield {
diff --git a/tests/test_resourcegroupstaggingapi/test_resourcegroupstaggingapi.py b/tests/test_resourcegroupstaggingapi/test_resourcegroupstaggingapi.py
index fc73f210dcb5..759c44569b7a 100644
--- a/tests/test_resourcegroupstaggingapi/test_resourcegroupstaggingapi.py
+++ b/tests/test_resourcegroupstaggingapi/test_resourcegroupstaggingapi.py
@@ -1203,3 +1203,40 @@ def test_get_resources_stepfunction():
     assert {"Key": "Name", "Value": "Alice"} in resp["ResourceTagMappingList"][0][
         "Tags"
     ]
+
+
+@mock_aws
+def test_get_resources_workspacesweb():
+    ww_client = boto3.client("workspaces-web", region_name="ap-southeast-1")
+    arn = ww_client.create_portal(
+        additionalEncryptionContext={"Key1": "Encryption", "Key2": "Context"},
+        authenticationType="Standard",
+        clientToken="TestClient",
+        customerManagedKey="abcd1234-5678-90ab-cdef-FAKEKEY",
+        displayName="TestDisplayName",
+        instanceType="TestInstanceType",
+        maxConcurrentSessions=5,
+        tags=[
+            {"Key": "TestKey", "Value": "TestValue"},
+            {"Key": "TestKey2", "Value": "TestValue2"},
+        ],
+    )["portalArn"]
+    rtapi = boto3.client("resourcegroupstaggingapi", region_name="ap-southeast-1")
+    resp = rtapi.get_resources(ResourceTypeFilters=["workspaces-web"])
+    assert len(resp["ResourceTagMappingList"]) == 1
+    assert {"Key": "TestKey", "Value": "TestValue"} in resp["ResourceTagMappingList"][
+        0
+    ]["Tags"]
+    resp = rtapi.get_resources(
+        ResourceTypeFilters=["workspaces-web"],
+        TagFilters=[{"Key": "TestKey3", "Values": ["TestValue3"]}],
+    )
+    assert len(resp["ResourceTagMappingList"]) == 0
+    ww_client.tag_resource(
+        resourceArn=arn, tags=[{"Key": "TestKey3", "Value": "TestValue3"}]
+    )
+    resp = rtapi.get_resources(
+        ResourceTypeFilters=["workspaces-web"],
+        TagFilters=[{"Key": "TestKey3", "Values": ["TestValue3"]}],
+    )
+    assert len(resp["ResourceTagMappingList"]) == 1