diff --git a/tests/unit/core/test_issue.py b/tests/unit/core/test_issue.py
index 5d6d4fcf..b05d8992 100644
--- a/tests/unit/core/test_issue.py
+++ b/tests/unit/core/test_issue.py
@@ -22,12 +22,12 @@ def test_issue_create(self):
     def test_issue_str(self):
         test_issue = _get_issue_instance()
         expect = ("Issue: 'Test issue' from B999:bandit_plugin:"
-                  f' CWE: {str(Cwe(Cwe.MULTIPLE_BINDS))},'
+                  ' CWE: %s,'
                   " Severity: MEDIUM "
                   "Confidence: MEDIUM at code.py:1")
 
         self.assertEqual(
-            expect,
+            expect % str(Cwe(Cwe.MULTIPLE_BINDS)),
             str(test_issue)
         )
 
diff --git a/tests/unit/formatters/test_text.py b/tests/unit/formatters/test_text.py
index af4d411e..99039a5f 100644
--- a/tests/unit/formatters/test_text.py
+++ b/tests/unit/formatters/test_text.py
@@ -132,7 +132,7 @@ def test_report_nobaseline(self, get_issue_list):
                               'binding.py (score: ',
                               "CONFIDENCE: 1",
                               "SEVERITY: 1",
-                              f'CWE: {str(Cwe(Cwe.MULTIPLE_BINDS))}',
+                              "CWE: %s" % str(Cwe(Cwe.MULTIPLE_BINDS)),
                               'Files excluded (1):',
                               'def.py',
                               'Undefined: 1',