diff --git a/src/Famix-Python-Importer-Tests/FamixPythonImporterWithFunctionsTest.class.st b/src/Famix-Python-Importer-Tests/FamixPythonImporterWithFunctionsTest.class.st
index d87fe97..d2010fc 100644
--- a/src/Famix-Python-Importer-Tests/FamixPythonImporterWithFunctionsTest.class.st
+++ b/src/Famix-Python-Importer-Tests/FamixPythonImporterWithFunctionsTest.class.st
@@ -21,7 +21,7 @@ FamixPythonImporterWithFunctionsTest >> testFunction [
 	| func |
 	func := self functionNamed: 'tryToPlaceWord'.
 	self assert: func class equals: FamixPythonFunction.
-	self assert: func signature equals: 'grid,word'
+	self assert: func signature equals: 'tryToPlaceWord(grid,word)'
 ]
 
 { #category : 'tests - functions' }
diff --git a/src/Famix-Python-Importer/PyAssignmentStatementNode.extension.st b/src/Famix-Python-Importer/PyAssignmentStatementNode.extension.st
index 278a655..2e45b86 100644
--- a/src/Famix-Python-Importer/PyAssignmentStatementNode.extension.st
+++ b/src/Famix-Python-Importer/PyAssignmentStatementNode.extension.st
@@ -4,5 +4,7 @@ Extension { #name : 'PyAssignmentStatementNode' }
 PyAssignmentStatementNode >> isInstanceVariableAssignation [
 	"I am an inst var assignation if I am in the form of `self.x = y`. For now I don't know if I need to do more than checking if the value of the receiver of the left side is #self. I might refine this method later."
 
+	self lhs isSubscriptExpression ifTrue: [ ^ false ].
+
 	^ self lhs receiver name = #self
 ]
diff --git a/src/Famix-Python-Importer/PyRootNode.extension.st b/src/Famix-Python-Importer/PyRootNode.extension.st
index e71a557..76eb660 100644
--- a/src/Famix-Python-Importer/PyRootNode.extension.st
+++ b/src/Famix-Python-Importer/PyRootNode.extension.st
@@ -7,6 +7,12 @@ PyRootNode >> fileReference [
 	^ self filename
 ]
 
+{ #category : '*Famix-Python-Importer' }
+PyRootNode >> isSubscriptExpression [
+
+	^ false
+]
+
 { #category : '*Famix-Python-Importer' }
 PyRootNode >> sourceFrom: startPosition to: stopPosition [
 
diff --git a/src/Famix-Python-Importer/PySubscriptExpressionNode.extension.st b/src/Famix-Python-Importer/PySubscriptExpressionNode.extension.st
new file mode 100644
index 0000000..9a50655
--- /dev/null
+++ b/src/Famix-Python-Importer/PySubscriptExpressionNode.extension.st
@@ -0,0 +1,7 @@
+Extension { #name : 'PySubscriptExpressionNode' }
+
+{ #category : '*Famix-Python-Importer' }
+PySubscriptExpressionNode >> isSubscriptExpression [
+
+	^ true
+]