diff --git a/Test/TestParser.hs b/Test/TestParser.hs
index 1caec8f..acb7ee7 100644
--- a/Test/TestParser.hs
+++ b/Test/TestParser.hs
@@ -84,6 +84,13 @@ testReturnVoid = TestCase $
     assertEqual "expect block with return nothing" (Block [Return Nothing]) $
     parseBlock [LBRACKET,RETURN,SEMICOLON,RBRACKET]
 
+testExpressionNot = TestCase $
+    assertEqual "expect expression not" (UnaryOperation Not (Reference "boar")) $
+    parseExpression [NOT,IDENTIFIER "boar"]
+testExpressionMinus = TestCase $
+    assertEqual "expect expression minus" (UnaryOperation Minus (Reference "boo")) $
+    parseExpression [MINUS,IDENTIFIER "boo"]
+
 tests = TestList [
     testSingleEmptyClass,
     testTwoEmptyClasses,
@@ -108,5 +115,7 @@ tests = TestList [
     testFieldWithInitialization,
     testLocalBoolWithInitialization,
     testFieldNullWithInitialization,
-    testReturnVoid
+    testReturnVoid,
+    testExpressionNot,
+    testExpressionMinus
     ]
\ No newline at end of file
diff --git a/src/Parser/JavaParser.y b/src/Parser/JavaParser.y
index c92f6f1..61bd1f1 100644
--- a/src/Parser/JavaParser.y
+++ b/src/Parser/JavaParser.y
@@ -298,12 +298,12 @@ fieldaccess      : primary  DOT IDENTIFIER { }
 
 unaryexpression         : unaryexpressionnotplusminus { $1 }
                 --  | predecrementexpression { }
-                --  | PLUS unaryexpression { }
-                --  | MINUS unaryexpression { }
+                 | PLUS unaryexpression { $2 }
+                 | MINUS unaryexpression { UnaryOperation Minus $2 }
                 --  | preincrementexpression { $1 }
 
 postfixexpression : primary { $1 }
-                --  | name { }
+                 | name { Reference $1 }
                 --  | postincrementexpression { }
                 --  | postdecrementexpression{ }
 
@@ -321,7 +321,7 @@ primarynonewarray : literal { $1 }
 
 unaryexpressionnotplusminus : postfixexpression { $1 }
                 --  | TILDE unaryexpression { }
-                --  | EXCLMARK unaryexpression { }
+                 | EXCLMARK unaryexpression { UnaryOperation Not $2 }
                 --  | castexpression{ }
 
 exclusiveorexpression : andexpression { $1 }