diff --git a/src/checker/dd/DDAlternatingChecker.cpp b/src/checker/dd/DDAlternatingChecker.cpp
index 8b769e13..156c5873 100644
--- a/src/checker/dd/DDAlternatingChecker.cpp
+++ b/src/checker/dd/DDAlternatingChecker.cpp
@@ -105,7 +105,7 @@ EquivalenceCriterion DDAlternatingChecker::checkEquivalence() {
 
   // if partial equivalence is being checked instead of total equivalence, it
   // suffices to change the last parameter of isCloseToIdentity to `false`
-  bool isClose = dd->isCloseToIdentity(
+  const bool isClose = dd->isCloseToIdentity(
       functionality, configuration.functionality.traceThreshold, garbage, true);
 
   if (isClose) {
diff --git a/test/test_partial_equivalence.cpp b/test/test_partial_equivalence.cpp
index ac283e90..82e4cdd7 100644
--- a/test/test_partial_equivalence.cpp
+++ b/test/test_partial_equivalence.cpp
@@ -101,7 +101,6 @@ TEST_F(PartialEqualityTest, AlternatingCheckerGarbageAndAncillary) {
   qc1.cx(2, 0);
 
   qc::QuantumComputation qc3(nqubits - 1);
-  qc3.setLogicalQubitGarbage(2);
   qc3.setLogicalQubitGarbage(1);
 
   qc3.h(0);