diff --git a/capa/features/extractors/viv/insn.py b/capa/features/extractors/viv/insn.py
index f6c9273c..0dcf1e87 100644
--- a/capa/features/extractors/viv/insn.py
+++ b/capa/features/extractors/viv/insn.py
@@ -5,8 +5,6 @@
 # Unless required by applicable law or agreed to in writing, software distributed under the License
 #  is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and limitations under the License.
-import sys
-
 import viv_utils
 import envi.memory
 import viv_utils.flirt
diff --git a/tests/test_rules.py b/tests/test_rules.py
index 8bc42e8c..7035892e 100644
--- a/tests/test_rules.py
+++ b/tests/test_rules.py
@@ -83,6 +83,7 @@ def test_rule_descriptions():
                 description: string description
               - string: '/myregex/'
                 description: regex description
+              - mnemonic: inc = mnemonic description
               # TODO - count(number(2 = number description)): 2
               - or:
                 - description: or description
@@ -104,6 +105,8 @@ def test_rule_descriptions():
             for child in statement.get_children():
                 rec(child)
         else:
+            if isinstance(statement.value, str):
+                assert "description" not in statement.value
             assert statement.description == statement.name + " description"
 
     rec(r.statement)