diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index 05633b529..15d3f0588 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -77,10 +77,12 @@ void assertCalculationDisplay(const char * input, ::Calculation::Calculation::Di
     quiz_assert(lastCalculation->exactAndApproximateDisplayedOutputsAreEqual(context) == sign);
   }
   if (exactOutput) {
-    quiz_assert(strcmp(lastCalculation->exactOutputText(), exactOutput) == 0);
+    constexpr int bufferSize = 500;
+    char buffer[bufferSize];
+    quiz_assert(strcmpWithSystemParentheses(lastCalculation->exactOutputText(), exactOutput) == 0);
   }
   if (approximateOutput) {
-    quiz_assert(strcmp(lastCalculation->approximateOutputText(), approximateOutput) == 0);
+    quiz_assert(strcmpWithSystemParentheses(lastCalculation->approximateOutputText(), approximateOutput) == 0);
   }
   store->deleteAll();
 }
diff --git a/apps/solver/test/equation_store.cpp b/apps/solver/test/equation_store.cpp
index 3452d6901..b33dda50e 100644
--- a/apps/solver/test/equation_store.cpp
+++ b/apps/solver/test/equation_store.cpp
@@ -40,16 +40,16 @@ void assert_equation_system_exact_solve_to(const char * equations[], EquationSto
   }
   if (type == EquationStore::Type::LinearSystem) {
     for (int i = 0; i < numberOfSolutions; i++) {
-      quiz_assert(strcmp(equationStore.variableAtIndex(i),variables[i]) == 0);
+      quiz_assert(strcmpWithSystemParentheses(equationStore.variableAtIndex(i),variables[i]) == 0);
     }
   } else {
-    quiz_assert(strcmp(equationStore.variableAtIndex(0), variables[0]) == 0);
+    quiz_assert(strcmpWithSystemParentheses(equationStore.variableAtIndex(0), variables[0]) == 0);
   }
   constexpr int bufferSize = 200;
   char buffer[bufferSize];
   for (int i = 0; i < numberOfSolutions; i++) {
     equationStore.exactSolutionLayoutAtIndex(i, true).serializeForParsing(buffer, bufferSize);
-    quiz_assert(strcmp(buffer, solutions[i]) == 0);
+    quiz_assert(strcmpWithSystemParentheses(buffer, solutions[i]) == 0);
   }
   equationStore.removeAll();
 }
diff --git a/poincare/test/helper.cpp b/poincare/test/helper.cpp
index fc3436671..9cb7fc05a 100644
--- a/poincare/test/helper.cpp
+++ b/poincare/test/helper.cpp
@@ -41,6 +41,28 @@ bool expressions_are_equal(Poincare::Expression expected, Poincare::Expression g
   return identical;
 }
 
+bool isLeftParenthesisCodePoint(CodePoint c) {
+  return (c == UCodePointLeftSystemParenthesis) || (c == '(');
+}
+
+bool isRightParenthesisCodePoint(CodePoint c) {
+  return (c == UCodePointRightSystemParenthesis) || (c == ')');
+}
+
+int strcmpWithSystemParentheses(const char * s1, const char * s2) {
+  quiz_assert(UTF8Decoder::CharSizeOfCodePoint(UCodePointLeftSystemParenthesis) == 1);
+  quiz_assert(UTF8Decoder::CharSizeOfCodePoint(UCodePointRightSystemParenthesis) == 1);
+   while(*s1 != 0
+      && ((*s1 == *s2)
+        || (isLeftParenthesisCodePoint(*s1) && isLeftParenthesisCodePoint(*s2))
+        || (isRightParenthesisCodePoint(*s1) && isRightParenthesisCodePoint(*s2))))
+  {
+    s1++;
+    s2++;
+  }
+  return (*(unsigned char *)s1) - (*(unsigned char *)s2);
+}
+
 Expression parse_expression(const char * expression, bool canBeUnparsable) {
   quiz_print(expression);
   Expression result = Expression::Parse(expression);
@@ -98,13 +120,14 @@ void assert_parsed_expression_process_to(const char * expression, const char * r
   print_expression(e, 0);
 #endif
   Expression m = process(e, globalContext, target, complexFormat, angleUnit);
-  char buffer[500];
-  m.serialize(buffer, sizeof(buffer), DecimalMode, numberOfSignifiantDigits);
+  constexpr int bufferSize = 500;
+  char buffer[bufferSize];
+  m.serialize(buffer, bufferSize, DecimalMode, numberOfSignifiantDigits);
 #if POINCARE_TESTS_PRINT_EXPRESSIONS
   cout << "---- serialize to: " << buffer << " ----"  << endl;
   cout << "----- compared to: " << result << " ----\n"  << endl;
 #endif
-  quiz_assert(strcmp(buffer, result) == 0);
+  quiz_assert(strcmpWithSystemParentheses(buffer, result) == 0);
 }
 
 template<typename T>
@@ -190,7 +213,7 @@ void assert_parsed_expression_layout_serialize_to_self(const char * expressionLa
 #if POINCARE_TESTS_PRINT_EXPRESSIONS
   cout << "---- serialized to: " << buffer << " ----\n"  << endl;
 #endif
-  quiz_assert(strcmp(expressionLayout, buffer) == 0);
+  quiz_assert(strcmpWithSystemParentheses(expressionLayout, buffer) == 0);
 }
 
 void assert_expression_layouts_as(Poincare::Expression expression, Poincare::Layout layout) {
@@ -207,7 +230,7 @@ void assert_expression_layout_serialize_to(Poincare::Layout layout, const char *
   cout << "---- serialized to: " << buffer << " ----"  << endl;
   cout << "----- compared to: " << serialization << " ----\n"  << endl;
 #endif
-  quiz_assert(strcmp(serialization, buffer) == 0);
+  quiz_assert(strcmpWithSystemParentheses(serialization, buffer) == 0);
 }
 
 template void assert_parsed_expression_evaluates_to<float>(char const*, char const *, Poincare::ExpressionNode::ReductionTarget, Poincare::Preferences::AngleUnit, Poincare::Preferences::ComplexFormat, int);
diff --git a/poincare/test/helper.h b/poincare/test/helper.h
index 091d68d74..91d728ce0 100644
--- a/poincare/test/helper.h
+++ b/poincare/test/helper.h
@@ -18,6 +18,8 @@ constexpr Poincare::Preferences::ComplexFormat Real = Poincare::Preferences::Com
 constexpr Poincare::Preferences::PrintFloatMode DecimalMode = Poincare::Preferences::PrintFloatMode::Decimal;
 constexpr Poincare::Preferences::PrintFloatMode ScientificMode = Poincare::Preferences::PrintFloatMode::Scientific;
 
+int strcmpWithSystemParentheses(const char * s1, const char * s2);
+
 bool expressions_are_equal(Poincare::Expression expected, Poincare::Expression got);
 Poincare::Expression parse_expression(const char * expression, bool canBeUnparsable = false);
 Poincare::Expression parse_and_simplify(const char * expression);