diff --git a/src/parser.py b/src/parser.py
index 26532c5..764b968 100644
--- a/src/parser.py
+++ b/src/parser.py
@@ -203,7 +203,9 @@ def expr(self):
             equals = EQUALS
 
             if self.current_token.type not in equals:
-                if self.current_token.type not in TOKENS_TO_QUOTE:
+                if self.current_token.type in [TT_EE, TT_GT, TT_LT, TT_GTE, TT_LTE]:
+                    error_msg = f"expected an assignation equal, but got a test equal ('{self.current_token.type}')."
+                elif self.current_token.type not in TOKENS_TO_QUOTE:
                     error_msg = f"expected an equal, but got {self.current_token.type}."
                 else:
                     error_msg = f"expected an equal, but got '{self.current_token.type}'."
diff --git a/version.json b/version.json
index 4af1979..e74b536 100644
--- a/version.json
+++ b/version.json
@@ -1,5 +1,5 @@
 {
-    "noug_version": "0.3",
+    "noug_version": "0.4",
     "phase": "alpha",
     "inherit": true
 }