diff --git a/source/Buoy-Metaprogramming-Tests/LanguagePlatformTest.class.st b/source/Buoy-Metaprogramming-Tests/LanguagePlatformTest.class.st
index 4ec4235..f9432a0 100644
--- a/source/Buoy-Metaprogramming-Tests/LanguagePlatformTest.class.st
+++ b/source/Buoy-Metaprogramming-Tests/LanguagePlatformTest.class.st
@@ -36,6 +36,14 @@ LanguagePlatformTest >> testForkNamedAt [
 	self assert: wasEvaluated
 ]
 
+{ #category : 'tests' }
+LanguagePlatformTest >> testGetInvalidInstanceVariable [
+
+	self
+		should: [ LanguagePlatform current instanceVariableNamed: 'variableForFailing' on: self ]
+		raise: Error
+]
+
 { #category : 'tests' }
 LanguagePlatformTest >> testGlobalNamedIfAbsent [
 
@@ -204,3 +212,11 @@ LanguagePlatformTest >> testRemoveGlobalNamedIfAbsent [
     ifAbsent: [ wasFound := false ].
   self deny: wasFound
 ]
+
+{ #category : 'tests' }
+LanguagePlatformTest >> testSetInvalidInstanceVariable [
+
+	self
+		should: [ LanguagePlatform current atInstanceVariableNamed: 'variableForFailing' on: self put: 8 ]
+		raise: Error
+]