diff --git a/lab-4/main_test.c b/lab-4/main_test.c
index 057bed9..de1f347 100644
--- a/lab-4/main_test.c
+++ b/lab-4/main_test.c
@@ -82,4 +82,31 @@ UTEST(parser, branching) {
 
   // Assert the result to test correctness
   ASSERT_EQ(result, 0); 
-}  
\ No newline at end of file
+} 
+
+UTEST(parser, quadratic) {
+  // Read sample file as input
+  yyin = fopen("samples/quadratic-snippet.cbl", "r");
+  yyrestart(yyin);
+  ASSERT_TRUE(yyin);
+
+  yylineno = 1;
+  int result = yyparse();
+
+  // Assert the result to test correctness
+  ASSERT_EQ(result, 0); 
+} 
+
+UTEST(parser, boolean) {
+  // Must include the null character to terminate input
+  char string[] = "IF A > B THEN Var = TRUE ELSE Var = FALSE\0"; 
+  YY_BUFFER_STATE buffer = yy_scan_buffer(string, sizeof(string));
+
+  yylineno = 1;
+  int result = yyparse();
+
+  yy_delete_buffer(buffer);
+
+  // Assert the result to test correctness
+  ASSERT_EQ(result, 0); 
+}