diff --git a/poincare/include/poincare/exception_expression_node.h b/poincare/include/poincare/exception_expression_node.h
index b2948af08..2f204769f 100644
--- a/poincare/include/poincare/exception_expression_node.h
+++ b/poincare/include/poincare/exception_expression_node.h
@@ -14,7 +14,7 @@ class ExceptionExpressionNode : public ExceptionNode<T> {
 public:
   // ExpressionNode
   ExpressionNode::Sign sign() const override { return ExpressionNode::Sign::Unknown; }
-  Expression setSign(ExpressionNode::Sign s, Context & context, Preferences::AngleUnit angleUnit) const override {}
+  Expression setSign(ExpressionNode::Sign s, Context & context, Preferences::AngleUnit angleUnit) const override { return Expression(this).clone(); }
   int polynomialDegree(char symbolName) const override { return -1; }
 
   Evaluation<float> approximate(ExpressionNode::SinglePrecision p, Context& context, Preferences::AngleUnit angleUnit) const override { return Complex<float>::Undefined(); }
diff --git a/poincare/test/integer.cpp b/poincare/test/integer.cpp
index 2e5413df8..2ecfe172f 100644
--- a/poincare/test/integer.cpp
+++ b/poincare/test/integer.cpp
@@ -11,7 +11,7 @@ static inline Integer MaxInteger() { return Integer(MaxIntegerString); }
 static inline Integer OverflowedInteger() { return Integer(OverflowedIntegerString); }
 
 QUIZ_CASE(poincare_integer_constructor) {
-  Integer staticZero();
+  Integer staticZero;
   Integer a("123");
   Integer na("-123");
   Integer b("12345678910111213141516");
diff --git a/poincare/test/rational.cpp b/poincare/test/rational.cpp
index cce748424..ee4d9b30d 100644
--- a/poincare/test/rational.cpp
+++ b/poincare/test/rational.cpp
@@ -140,6 +140,6 @@ QUIZ_CASE(poincare_rational_serialize) {
   assert_parsed_expression_serialize_to(Rational("2345678909876"), "2345678909876");
   assert_parsed_expression_serialize_to(Rational("-2345678909876", "5"), "-2345678909876/5");
   assert_parsed_expression_serialize_to(Rational(Integer(MaxIntegerString)), MaxIntegerString);
-  assert_parsed_expression_serialize_to(Rational(1, Integer::Overflow()), "1/inf");
+  assert_parsed_expression_serialize_to(Rational(Integer(1), Integer::Overflow()), "1/inf");
   assert_parsed_expression_serialize_to(Rational(Integer::Overflow()), "inf");
 }