diff --git a/setup.py b/setup.py
index db47f66..89bf641 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@
 
 setup(
     name='tstl',
-    version='1.2.37',
+    version='1.2.38',
     description='Template scripting testing language (TSTL)',
     long_description_content_type="text/markdown",    
     long_description=open('README.md').read(),
diff --git a/tstl/harnessmaker.py b/tstl/harnessmaker.py
index 2fc7515..46fd0b6 100644
--- a/tstl/harnessmaker.py
+++ b/tstl/harnessmaker.py
@@ -445,7 +445,7 @@ def main():
     baseIndent = "    "
 
     if "-v" in sys.argv or "--version" in sys.argv:
-        print("TSTL, version 1.2.37")
+        print("TSTL, version 1.2.38")
         print("Documentation at https://github.com/agroce/tstl")
         sys.exit(0)
 
diff --git a/tstl/randomtester.py b/tstl/randomtester.py
index 6474c65..96ce730 100644
--- a/tstl/randomtester.py
+++ b/tstl/randomtester.py
@@ -520,6 +520,10 @@ def handle_failure(
     if (not newCov) and (not becauseBranchCov) and (not becauseStatementCov):
         failCount += 1
         print(msg)
+        if checkFail:
+            assert sut.failsCheck(test)
+        else:
+            assert sut.fails(test)
         f = sut.failure()
         print("ERROR:", f)
         print("TRACEBACK:")
@@ -633,6 +637,17 @@ def failProp(x): return sut.failsCheck(x, failure=f)
         if config.normalize:
             startSimplify = time.time()
             print("NORMALIZING...")
+            if not failProp(test):
+                print("ALPHA CONVERSION CHANGED FAILURE SIGNATURE FOR ASSERTION, CORRECTING...")
+                if checkFail:
+                    assert sut.failsCheck(test)
+                else:
+                    assert sut.fails(test)
+                f = sut.failure()
+                if checkFail:
+                    def failProp(x): return sut.failsCheck(x, failure=f)
+                else:
+                    def failProp(x): return sut.fails(x, failure=f)
             test = sut.normalize(
                 test,
                 failProp,