diff --git a/tests/parser_test.cpp b/tests/parser_test.cpp
index d2aa3e0..ac8c2dd 100644
--- a/tests/parser_test.cpp
+++ b/tests/parser_test.cpp
@@ -44,27 +44,32 @@ TEST(ParserTest, Prototype) {
 }
 
 TEST(ParserTest, Expr) {
-  Parser parser("a*a + b*b - c*c + x%m + y/q");
-  ExprNode
-      expected = std::make_unique<BinaryExprNode>(
-          "+",
-          std::make_unique<BinaryExprNode>(
-              "+",
-              std::make_unique<BinaryExprNode>(
-                  "-",
-                  std::make_unique<BinaryExprNode>(
-                      "+",
-                      std::make_unique<BinaryExprNode>(
-                          "*", VariableExprNode("a"), VariableExprNode("a")),
-                      std::make_unique<BinaryExprNode>(
-                          "*", VariableExprNode("b"), VariableExprNode("b"))),
-                  std::make_unique<BinaryExprNode>("*", VariableExprNode("c"),
-                                                   VariableExprNode("c"))),
-              std::make_unique<BinaryExprNode>("%", VariableExprNode("x"),
-                                               VariableExprNode("m"))),
-          std::make_unique<BinaryExprNode>("/", VariableExprNode("y"),
-                                           VariableExprNode("q"))),
-      parsed = parser.parse_expr();
+  Parser parser("a*a + b*b - c*c + x%m + y/q != 0");
+  ExprNode expected = std::make_unique<BinaryExprNode>(
+               "!=",
+               std::make_unique<BinaryExprNode>(
+                   "+",
+                   std::make_unique<BinaryExprNode>(
+                       "+",
+                       std::make_unique<BinaryExprNode>(
+                           "-",
+                           std::make_unique<BinaryExprNode>(
+                               "+",
+                               std::make_unique<BinaryExprNode>(
+                                   "*", VariableExprNode("a"),
+                                   VariableExprNode("a")),
+                               std::make_unique<BinaryExprNode>(
+                                   "*", VariableExprNode("b"),
+                                   VariableExprNode("b"))),
+                           std::make_unique<BinaryExprNode>(
+                               "*", VariableExprNode("c"),
+                               VariableExprNode("c"))),
+                       std::make_unique<BinaryExprNode>(
+                           "%", VariableExprNode("x"), VariableExprNode("m"))),
+                   std::make_unique<BinaryExprNode>("/", VariableExprNode("y"),
+                                                    VariableExprNode("q"))),
+               LiteralExprNode<int>(0)),
+           parsed = parser.parse_expr();
   EXPECT_EQ(expected, parsed);
 }