diff --git a/src/Binder/Binder.cpp b/src/Binder/Binder.cpp
index 1965ace..72852a1 100644
--- a/src/Binder/Binder.cpp
+++ b/src/Binder/Binder.cpp
@@ -1,9 +1,11 @@
 
 #include "Binder.hpp"
 
-BoundScriptStatement *Binder::Bind(Script* script, ParsedScriptStatement *s) {
+BoundScriptStatement *Binder::Bind(Script* script, ParsedScriptStatement *s, BoundScope* scriptScope) {
     auto binder = Binder();
-    binder.ScriptData = script;
+    binder._scriptData = script;
+
+    binder._scope = scriptScope;
     auto statements = s->GetStatements();
     vector<BoundStatement*> boundStatements (statements.size());
     for (int i = 0; i < statements.size(); i++){
@@ -12,11 +14,18 @@ BoundScriptStatement *Binder::Bind(Script* script, ParsedScriptStatement *s) {
     return new BoundScriptStatement(boundStatements);
 }
 
+Binder::~Binder() {
+    delete _scope;
+}
+
 BoundStatement* Binder::BindStatement(ParsedStatement* statement){
     switch (statement -> GetKind()) {
         case ParsedStatementKind ::Script: throw; // This shouldn't happen.
         case ParsedStatementKind ::Block: return this -> BindBlockStatement(statement);
         case ParsedStatementKind ::Expression: return this -> BindExpressionStatement(statement);
+        case ParsedStatementKind::Assignment: return this -> BindAssignmentStatement(statement);
+
+        case ParsedStatementKind::Bad: return new BoundBadStatement();
     }
 }
 
@@ -34,6 +43,20 @@ BoundStatement *Binder::BindExpressionStatement(ParsedStatement *statement) {
     return new BoundExpressionStatement(this -> BindExpression(exp));
 }
 
+BoundStatement* Binder::BindAssignmentStatement(ParsedStatement *statement){
+    auto s = (ParsedAssignmentStatement*) statement;
+    auto boundExpression = this->BindExpression(s->GetExpression());
+    auto assignment = this->_scope->AssignVariable(s->GetIdentifier().GetHash(), boundExpression->GetType());
+    if (assignment.GetResult() == VariableAssignmentResult::Ok){
+        auto key = assignment.GetKey();
+        return new BoundAssignmentStatement(key, boundExpression);
+    }
+    else{
+        this -> _scriptData -> Diagnostics -> LogError(DiagnosticCode::CantAssignVariable, statement->GetStartPosition(), statement->GetLength());
+        return new BoundBadStatement();
+    }
+}
+
 BoundExpression* Binder::BindExpression(ParsedExpression* expression){
     switch (expression -> GetKind()){
         case ParsedExpressionKind ::LiteralInteger:
@@ -149,7 +172,7 @@ BoundExpression* Binder::BindBinaryOperator(BinaryExpression* expression){
                                                  expression->GetStartPosition(), expression->GetLength());
             break;
     }
-    this -> ScriptData -> Diagnostics->LogError(DiagnosticCode::NoBinaryOperationFound, expression->GetStartPosition(), expression->GetLength());
+    this -> _scriptData -> Diagnostics->LogError(DiagnosticCode::NoBinaryOperationFound, expression->GetStartPosition(), expression->GetLength());
     return new BoundBadExpression(expression->GetStartPosition(), expression->GetLength());
 }
 
@@ -179,7 +202,8 @@ BoundExpression* Binder::BindUnaryOperator(UnaryExpression* expression){
         default:
             break;
     }
-    this -> ScriptData -> Diagnostics->LogError(DiagnosticCode::NoUnaryOperationFound, expression->GetStartPosition(), expression->GetLength());
+    this -> _scriptData -> Diagnostics->LogError(DiagnosticCode::NoUnaryOperationFound, expression->GetStartPosition(), expression->GetLength());
     return new BoundBadExpression(expression->GetStartPosition(), expression->GetLength());
 
-}
\ No newline at end of file
+}
+
diff --git a/src/Binder/Binder.hpp b/src/Binder/Binder.hpp
index a08b1be..2ba7b8c 100644
--- a/src/Binder/Binder.hpp
+++ b/src/Binder/Binder.hpp
@@ -4,20 +4,25 @@
 #include "../Parser/ParsedStatements/ParsedStatement.hpp"
 #include "BoundStatements/BoundStatement.hpp"
 #include "../Script.hpp"
+#include "BoundVariables/BoundScope.hpp"
 
 
 class Binder {
-    Script* ScriptData;
+    Script* _scriptData;
+    BoundScope* _scope;
+
+    ~Binder();
 
     BoundStatement *BindStatement(ParsedStatement *statement);
     BoundStatement *BindBlockStatement(ParsedStatement *statement);
     BoundStatement *BindExpressionStatement(ParsedStatement *statement);
+    BoundStatement *BindAssignmentStatement(ParsedStatement *statement);
 
     BoundExpression *BindExpression(ParsedExpression *expression);
     BoundExpression *BindBinaryOperator(BinaryExpression *expression);
     BoundExpression *BindUnaryOperator(UnaryExpression *expression);
 public:
-    static BoundScriptStatement* Bind(Script* script, ParsedScriptStatement* s);
+    static BoundScriptStatement* Bind(Script* script, ParsedScriptStatement* s, BoundScope* scriptScope);
 
 };
 
diff --git a/src/Binder/BoundStatements/BoundStatement.hpp b/src/Binder/BoundStatements/BoundStatement.hpp
index 9031a39..d161604 100644
--- a/src/Binder/BoundStatements/BoundStatement.hpp
+++ b/src/Binder/BoundStatements/BoundStatement.hpp
@@ -6,13 +6,16 @@
 
 #include <vector>
 #include "../BoundExpressions/BoundExpression.hpp"
+#include "../BoundVariables/BoundVariableKey.hpp"
 
 using namespace std;
 
 enum class BoundStatementKind{
+    Bad,
     Script,
     Block,
     Expression,
+    Assignment,
 };
 
 class BoundStatement{
@@ -21,6 +24,13 @@ public:
     virtual ~BoundStatement() = default;
 };
 
+class BoundBadStatement : public BoundStatement{
+public:
+    BoundStatementKind GetKind() final{
+        return BoundStatementKind ::Bad;
+    }
+};
+
 class BoundBlockStatement : public BoundStatement{
     vector<BoundStatement*> _statements;
 public:
@@ -72,4 +82,22 @@ public:
     }
 };
 
+class BoundAssignmentStatement : public BoundStatement{
+    BoundVariableKey* _key;
+    BoundExpression* _expression;
+public:
+    BoundAssignmentStatement(BoundVariableKey* key, BoundExpression* expression){
+        _key = key;
+        _expression = expression;
+    }
+    ~BoundAssignmentStatement() final{
+        delete _key;
+        delete _expression;
+    }
+
+    BoundStatementKind GetKind() final{
+        return BoundStatementKind ::Assignment;
+    }
+};
+
 #endif //PORYGONLANG_BOUNDSTATEMENT_HPP
diff --git a/src/Binder/BoundVariables/BoundScope.cpp b/src/Binder/BoundVariables/BoundScope.cpp
new file mode 100644
index 0000000..8f01473
--- /dev/null
+++ b/src/Binder/BoundVariables/BoundScope.cpp
@@ -0,0 +1,2 @@
+
+#include "BoundScope.hpp"
diff --git a/src/Binder/BoundVariables/BoundScope.hpp b/src/Binder/BoundVariables/BoundScope.hpp
new file mode 100644
index 0000000..6a7d3f3
--- /dev/null
+++ b/src/Binder/BoundVariables/BoundScope.hpp
@@ -0,0 +1,88 @@
+
+#ifndef PORYGONLANG_BOUNDSCOPE_HPP
+#define PORYGONLANG_BOUNDSCOPE_HPP
+
+#include <string>
+#include <unordered_map>
+#include <vector>
+#include "BoundVariable.hpp"
+#include "BoundVariableKey.hpp"
+#include "VariableAssigmentResult.hpp"
+#include "../../Utilities/HashedString.hpp"
+
+using namespace std;
+
+class BoundScope {
+    unordered_map<int, BoundVariable*>* _scriptScope;
+    vector<unordered_map<int, BoundVariable*>> _localScope;
+    int _currentScope;
+public:
+    explicit BoundScope(unordered_map<int, BoundVariable*> *scriptScope){
+        _scriptScope = scriptScope;
+        _currentScope = 1;
+        _localScope = vector<unordered_map<int, BoundVariable*>>(1);
+    }
+    ~BoundScope(){
+        _localScope.clear();
+    }
+
+    int Exists(int key){
+        auto found = this -> _scriptScope -> find(key);
+        if (found != _scriptScope -> end()){
+            return 0;
+        }
+        for (int i = _currentScope - 1; i >= 0; i--){
+            auto scope = _localScope.at(i);
+            found = scope.find(key);
+            if (found != scope.end()){
+                return i + 1;
+            }
+        }
+        return -1;
+    }
+
+    BoundVariable* GetVariable(int scope, int identifier){
+        if (scope == 0){
+            auto find = this -> _scriptScope->find(identifier);
+            if (find != _scriptScope->end()){
+                return find -> second;
+            }
+            return nullptr;
+        } else{
+            auto s = this->_localScope.at(scope);
+            auto find = s.find(identifier);
+            if (find != s.end()){
+                return find -> second;
+            }
+            return nullptr;
+        }
+    }
+
+    VariableAssignment CreateExplicitLocal(HashedString& identifier, ScriptType* type){
+        auto scope = this->_localScope.at(this->_currentScope);
+        if (scope.find(identifier.GetHash()) != scope.end()){
+            return VariableAssignment(VariableAssignmentResult::ExplicitLocalVariableExists, nullptr);
+        }
+        scope.insert({identifier.GetHash(), new BoundVariable(type)});
+        return VariableAssignment(VariableAssignmentResult::Ok, new BoundVariableKey(identifier.GetHash(), this->_currentScope, true));
+    }
+
+    VariableAssignment AssignVariable(int identifier, ScriptType* type){
+        int exists = this->Exists(identifier);
+        if (exists == -1){
+            // Creation
+            _scriptScope->insert({identifier, new BoundVariable(type)});
+            return VariableAssignment(VariableAssignmentResult::Ok, new BoundVariableKey(identifier, 0, true));
+        } else{
+            // Assigning
+            auto var = this->GetVariable(exists, identifier);
+            if (var->GetType() != type){
+                return VariableAssignment(VariableAssignmentResult::VariableDefinedWithDifferentType, nullptr);
+            }
+            return VariableAssignment(VariableAssignmentResult::Ok, new BoundVariableKey(identifier, exists, false));
+        }
+    }
+};
+
+
+#endif //PORYGONLANG_BOUNDSCOPE_HPP
diff --git a/src/Binder/BoundVariables/BoundVariable.hpp b/src/Binder/BoundVariables/BoundVariable.hpp
new file mode 100644
index 0000000..b47c18b
--- /dev/null
+++ b/src/Binder/BoundVariables/BoundVariable.hpp
@@ -0,0 +1,22 @@
+
+#ifndef PORYGONLANG_BOUNDVARIABLE_HPP
+#define PORYGONLANG_BOUNDVARIABLE_HPP
+
+#include "../../ScriptType.hpp"
+
+class BoundVariable{
+    ScriptType* _type;
+public:
+    explicit BoundVariable(ScriptType* type){
+        _type = type;
+    }
+    ~BoundVariable(){
+        delete _type;
+    }
+
+    ScriptType* GetType(){
+        return _type;
+    }
+};
+
+#endif //PORYGONLANG_BOUNDVARIABLE_HPP
diff --git a/src/Binder/BoundVariables/BoundVariableKey.hpp b/src/Binder/BoundVariables/BoundVariableKey.hpp
new file mode 100644
index 0000000..220476f
--- /dev/null
+++ b/src/Binder/BoundVariables/BoundVariableKey.hpp
@@ -0,0 +1,33 @@
+#include <utility>
+
+
+#ifndef PORYGONLANG_BOUNDVARIABLEKEY_HPP
+#define PORYGONLANG_BOUNDVARIABLEKEY_HPP
+
+#include <string>
+
+class BoundVariableKey{
+    int _identifier;
+    unsigned int _scopeId;
+    bool _isCreation;
+public:
+    BoundVariableKey(int id, unsigned int scope, bool creation){
+        _identifier = std::move(id);
+        _scopeId = scope;
+        _isCreation = creation;
+    }
+
+    int GetIdentifier(){
+        return _identifier;
+    }
+
+    unsigned int GetScopeId(){
+        return _scopeId;
+    }
+
+    bool IsCreation(){
+        return _isCreation;
+    }
+};
+
+#endif //PORYGONLANG_BOUNDVARIABLEKEY_HPP
diff --git a/src/Binder/BoundVariables/VariableAssigmentResult.hpp b/src/Binder/BoundVariables/VariableAssigmentResult.hpp
new file mode 100644
index 0000000..7e449df
--- /dev/null
+++ b/src/Binder/BoundVariables/VariableAssigmentResult.hpp
@@ -0,0 +1,31 @@
+
+#ifndef PORYGONLANG_VARIABLEASSIGMENTRESULT_HPP
+#define PORYGONLANG_VARIABLEASSIGMENTRESULT_HPP
+
+#include "BoundVariableKey.hpp"
+
+enum class VariableAssignmentResult{
+    Ok,
+    ExplicitLocalVariableExists,
+    VariableDefinedWithDifferentType
+};
+
+class VariableAssignment{
+    VariableAssignmentResult _result;
+    BoundVariableKey* _key;
+public:
+    VariableAssignment(VariableAssignmentResult result, BoundVariableKey *key) {
+        _result = result;
+        _key = key;
+    }
+
+    VariableAssignmentResult GetResult(){
+        return _result;
+    }
+
+    BoundVariableKey* GetKey(){
+        return _key;
+    }
+};
+
+#endif //PORYGONLANG_VARIABLEASSIGMENTRESULT_HPP
diff --git a/src/Diagnostics/DiagnosticCode.hpp b/src/Diagnostics/DiagnosticCode.hpp
index a76b71f..c481752 100644
--- a/src/Diagnostics/DiagnosticCode.hpp
+++ b/src/Diagnostics/DiagnosticCode.hpp
@@ -13,6 +13,7 @@ enum class DiagnosticCode{
     // Bind diagnostics
     NoBinaryOperationFound,
     NoUnaryOperationFound,
+    CantAssignVariable,
 };
 
 #endif //PORYGONLANG_DIAGNOSTICCODE_HPP
diff --git a/src/Parser/ParsedStatements/ParsedStatement.hpp b/src/Parser/ParsedStatements/ParsedStatement.hpp
index 015d9c3..a69e4d0 100644
--- a/src/Parser/ParsedStatements/ParsedStatement.hpp
+++ b/src/Parser/ParsedStatements/ParsedStatement.hpp
@@ -1,3 +1,7 @@
+#include <utility>
+
+#include <utility>
+
 
 
 #ifndef PORYGONLANG_PARSEDSTATEMENT_HPP
@@ -8,6 +12,7 @@
 #include <string>
 
 #include "../ParsedExpressions/ParsedExpression.hpp"
+#include "../../Utilities/HashedString.hpp"
 
 enum class ParsedStatementKind{
     Bad,
@@ -32,6 +37,10 @@ public:
         return _start;
     }
 
+    unsigned int GetLength(){
+        return _length;
+    }
+
     unsigned int GetEndPosition(){
         return _start + _length - 1;
     }
@@ -98,13 +107,13 @@ public:
 
 class ParsedAssignmentStatement : public ParsedStatement{
     bool _local;
-    std::string _identifier;
+    HashedString _identifier;
     ParsedExpression* _expression;
 public:
     ParsedAssignmentStatement(bool local, std::string identifier, ParsedExpression* expression, unsigned int start, unsigned int length)
-    : ParsedStatement(start, length){
+    : ParsedStatement(start, length), _identifier(HashedString(std::move(identifier)))
+    {
         _local = local;
-        _identifier = std::move(identifier);
         _expression = expression;
     }
     ~ParsedAssignmentStatement() final{
@@ -119,7 +128,7 @@ public:
         return _local;
     }
 
-    std::string GetIdentifier(){
+    HashedString GetIdentifier(){
         return _identifier;
     }
 
diff --git a/src/Script.cpp b/src/Script.cpp
index 60aea26..68dcdea 100644
--- a/src/Script.cpp
+++ b/src/Script.cpp
@@ -1,14 +1,13 @@
 #include <utility>
-
-
+#include <unordered_map>
 #include "Script.hpp"
 #include "Parser/Lexer.hpp"
 #include "Parser/Parser.hpp"
 #include "Binder/Binder.hpp"
 
-Script Script::Create(string script) {
-    auto s = Script();
-    s.Parse(std::move(script));
+Script* Script::Create(string script) {
+    auto s = new Script();
+    s -> Parse(std::move(script));
     return s;
 }
 
@@ -40,7 +39,14 @@ void Script::Parse(string script) {
     }
     lexResult.clear();
     if (!Diagnostics->HasErrors()){
-        this->BoundScript = Binder::Bind(this, parseResult);
+        unordered_map<int, BoundVariable*> scriptScope;
+        auto bindScope = new BoundScope(&scriptScope);
+        this->BoundScript = Binder::Bind(this, parseResult, bindScope);
+        for (const auto& v : scriptScope){
+            this->_scopeVariables.insert({v.first, nullptr});
+            delete v.second;
+        }
+        scriptScope.clear();
     }
     delete parseResult;
 }
diff --git a/src/Script.hpp b/src/Script.hpp
index 4ce2052..2ff91b0 100644
--- a/src/Script.hpp
+++ b/src/Script.hpp
@@ -5,13 +5,14 @@
 #define PORYGONLANG_SCRIPT_HPP
 
 #include <string>
-#include <boost/any.hpp>
+#include <unordered_map>
 #include "Diagnostics/Diagnostics.hpp"
 #include "Binder/BoundStatements/BoundStatement.hpp"
 class Script;
 class Evaluator;
 #include "Evaluator/Evaluator.hpp"
 #include "Evaluator/EvalValues/EvalValue.hpp"
+#include "Utilities/HashedString.hpp"
 
 using namespace std;
 
@@ -19,15 +20,15 @@ class Script {
     friend class Evaluator;
 
     EvalValue* _lastValue;
-
     Evaluator* _evaluator;
+    unordered_map<int, EvalValue*> _scopeVariables;
 
     explicit Script();
 
     void Parse(string script);
     BoundScriptStatement* BoundScript;
 public:
-    static Script Create(string script);
+    static Script* Create(string script);
     Diagnostics* Diagnostics;
 
     ~Script();
@@ -37,6 +38,10 @@ public:
     EvalValue* GetLastValue(){
         return _lastValue;
     };
+
+    EvalValue* GetVariable(const string& key){
+        return _scopeVariables.at(HashedString(key).GetHash());
+    }
 };
 
 
diff --git a/src/Utilities/HashedString.hpp b/src/Utilities/HashedString.hpp
new file mode 100644
index 0000000..b276f55
--- /dev/null
+++ b/src/Utilities/HashedString.hpp
@@ -0,0 +1,24 @@
+
+#ifndef PORYGONLANG_HASHEDSTRING_HPP
+#define PORYGONLANG_HASHEDSTRING_HPP
+
+#include <string>
+
+class HashedString{
+    int _hash;
+    static unsigned constexpr const_hash(char const *input) {
+        return *input ?
+               static_cast<unsigned int>(*input) + 33 * const_hash(input + 1) :
+               5381;
+    }
+public:
+    explicit HashedString(std::string s){
+        _hash = const_hash(s.c_str());
+    }
+
+    const int GetHash(){
+        return _hash;
+    }
+};
+
+#endif //PORYGONLANG_HASHEDSTRING_HPP
diff --git a/tests/integration/DiagnosticsTests.cpp b/tests/integration/DiagnosticsTests.cpp
index 977faa0..4b719e6 100644
--- a/tests/integration/DiagnosticsTests.cpp
+++ b/tests/integration/DiagnosticsTests.cpp
@@ -4,9 +4,9 @@
 #include "../src/Script.hpp"
 
 TEST_CASE( "Diagnostic invalid character", "[integration]" ) {
-    Script script = Script::Create("1 + 1 @");
-    REQUIRE(script.Diagnostics -> HasErrors());
-    auto diags = script.Diagnostics -> GetDiagnostics();
+    auto script = Script::Create("1 + 1 @");
+    REQUIRE(script->Diagnostics -> HasErrors());
+    auto diags = script->Diagnostics -> GetDiagnostics();
     REQUIRE(diags.size() == 1);
     CHECK(diags[0].GetCode() == DiagnosticCode::UnexpectedCharacter);
     CHECK(diags[0].GetStartPosition() == 6);
@@ -14,9 +14,9 @@ TEST_CASE( "Diagnostic invalid character", "[integration]" ) {
 }
 
 TEST_CASE( "Diagnostic invalid token", "[integration]" ) {
-    Script script = Script::Create("1 +/ 1");
-    REQUIRE(script.Diagnostics -> HasErrors());
-    auto diags = script.Diagnostics -> GetDiagnostics();
+    auto script = Script::Create("1 +/ 1");
+    REQUIRE(script->Diagnostics -> HasErrors());
+    auto diags = script->Diagnostics -> GetDiagnostics();
     REQUIRE(diags.size() == 1);
     CHECK(diags[0].GetCode() == DiagnosticCode::UnexpectedToken);
     CHECK(diags[0].GetStartPosition() == 3);
diff --git a/tests/integration/EqualityOperationsTests.cpp b/tests/integration/EqualityOperationsTests.cpp
index 6ac40dd..c60b6c0 100644
--- a/tests/integration/EqualityOperationsTests.cpp
+++ b/tests/integration/EqualityOperationsTests.cpp
@@ -4,55 +4,55 @@
 #include "../src/Script.hpp"
 
 TEST_CASE( "True Equals True", "[integration]" ) {
-    Script script = Script::Create("true == true");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("true == true");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateBool());
 }
 TEST_CASE( "True Not Equals True", "[integration]" ) {
-    Script script = Script::Create("true == false");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("true == false");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(!lastValue->EvaluateBool());
 }
 TEST_CASE( "True Nequals False", "[integration]" ) {
-    Script script = Script::Create("true ~= false");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("true ~= false");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateBool());
 }
 TEST_CASE( "True Not Nequals True", "[integration]" ) {
-    Script script = Script::Create("true ~= true");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("true ~= true");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(!lastValue->EvaluateBool());
 }
 
 
 TEST_CASE( "False Equals False", "[integration]" ) {
-    Script script = Script::Create("false == false");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("false == false");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateBool());
 }
 
 TEST_CASE( "10 Equals 10", "[integration]" ) {
-    Script script = Script::Create("10 == 10");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("10 == 10");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateBool());
 }
 TEST_CASE( "10 Not Equals 5", "[integration]" ) {
-    Script script = Script::Create("10 == 5");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("10 == 5");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(!lastValue->EvaluateBool());
 }
 
diff --git a/tests/integration/LogicalOperationsTests.cpp b/tests/integration/LogicalOperationsTests.cpp
index 024e86b..a25b9b5 100644
--- a/tests/integration/LogicalOperationsTests.cpp
+++ b/tests/integration/LogicalOperationsTests.cpp
@@ -3,92 +3,92 @@
 #include "../src/Script.hpp"
 
 TEST_CASE( "Basic True", "[integration]" ) {
-    Script script = Script::Create("true");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("true");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateBool());
 }
 
 TEST_CASE( "Basic False", "[integration]" ) {
-    Script script = Script::Create("false");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("false");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(!lastValue->EvaluateBool());
 }
 
 TEST_CASE( "True and True", "[integration]" ) {
-    Script script = Script::Create("true and true");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("true and true");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateBool());
 }
 TEST_CASE( "True and False", "[integration]" ) {
-    Script script = Script::Create("true and false");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("true and false");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(!lastValue->EvaluateBool());
 }
 TEST_CASE( "False and True", "[integration]" ) {
-    Script script = Script::Create("false and true");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("false and true");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(!lastValue->EvaluateBool());
 }
 TEST_CASE( "False and False", "[integration]" ) {
-    Script script = Script::Create("false and false");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("false and false");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(!lastValue->EvaluateBool());
 }
 
 TEST_CASE( "True or True", "[integration]" ) {
-    Script script = Script::Create("true or true");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("true or true");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateBool());
 }
 TEST_CASE( "True or False", "[integration]" ) {
-    Script script = Script::Create("true or false");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("true or false");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateBool());
 }
 TEST_CASE( "False or True", "[integration]" ) {
-    Script script = Script::Create("false or true");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("false or true");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateBool());
 }
 TEST_CASE( "False or False", "[integration]" ) {
-    Script script = Script::Create("false or false");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("false or false");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(!lastValue->EvaluateBool());
 }
 
 TEST_CASE( "Not True", "[integration]" ) {
-    Script script = Script::Create("not true");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("not true");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(!lastValue->EvaluateBool());
 }
 
 TEST_CASE( "Not False", "[integration]" ) {
-    Script script = Script::Create("not false");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("not false");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateBool());
 }
 
diff --git a/tests/integration/NumericalOperationsTests.cpp b/tests/integration/NumericalOperationsTests.cpp
index b11e650..8563c0e 100644
--- a/tests/integration/NumericalOperationsTests.cpp
+++ b/tests/integration/NumericalOperationsTests.cpp
@@ -3,75 +3,75 @@
 #include "../src/Script.hpp"
 
 TEST_CASE( "Integer Negation", "[integration]" ) {
-    Script script = Script::Create("-60");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("-60");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateInteger() == -60);
 }
 TEST_CASE( "Float Negation", "[integration]" ) {
-    Script script = Script::Create("-5.65");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("-5.65");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateFloat() == Approx(-5.65));
 }
 
 TEST_CASE( "Integer Addition", "[integration]" ) {
-    Script script = Script::Create("1 + 5");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("1 + 5");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateInteger() == 6);
 }
 TEST_CASE( "Integer Subtraction", "[integration]" ) {
-    Script script = Script::Create("1 - 5");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("1 - 5");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateInteger() == -4);
 }
 TEST_CASE( "Integer Multiplication", "[integration]" ) {
-    Script script = Script::Create("5 * 8");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("5 * 8");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateInteger() == 40);
 }
 TEST_CASE( "Integer Division", "[integration]" ) {
-    Script script = Script::Create("40 / 8");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("40 / 8");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateInteger() == 5);
 }
 
 TEST_CASE( "Float Addition", "[integration]" ) {
-    Script script = Script::Create("1.2 + 5.34");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("1.2 + 5.34");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateFloat() == 6.54);
 }
 TEST_CASE( "Float Subtraction", "[integration]" ) {
-    Script script = Script::Create("1.8 - 5.14");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("1.8 - 5.14");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateFloat() == -3.34);
 }
 TEST_CASE( "Float Multiplication", "[integration]" ) {
-    Script script = Script::Create("5.2 * 8.9");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("5.2 * 8.9");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateFloat() == 46.28);
 }
 TEST_CASE( "Float Division", "[integration]" ) {
-    Script script = Script::Create("95.18 / 8.87");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("95.18 / 8.87");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateFloat() == Approx(10.7305524239));
 }
 #endif
diff --git a/tests/integration/StringOperationsTests.cpp b/tests/integration/StringOperationsTests.cpp
index db7d695..19fdfa5 100644
--- a/tests/integration/StringOperationsTests.cpp
+++ b/tests/integration/StringOperationsTests.cpp
@@ -5,18 +5,18 @@
 
 
 TEST_CASE( "Simple String", "[integration]" ) {
-    Script script = Script::Create("\"foo bar\"");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("\"foo bar\"");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateString() == "foo bar");
 }
 
 TEST_CASE( "String Concat", "[integration]" ) {
-    Script script = Script::Create("\"foo\" + \"bar\"");
-    REQUIRE(!script.Diagnostics -> HasErrors());
-    script.Evaluate();
-    auto lastValue = script.GetLastValue();
+    auto script = Script::Create("\"foo\" + \"bar\"");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto lastValue = script->GetLastValue();
     REQUIRE(lastValue->EvaluateString() == "foobar");
 }
 
diff --git a/tests/integration/Variables.cpp b/tests/integration/Variables.cpp
new file mode 100644
index 0000000..daa9806
--- /dev/null
+++ b/tests/integration/Variables.cpp
@@ -0,0 +1,13 @@
+#ifdef TESTS_BUILD
+#include <catch.hpp>
+#include "../src/Script.hpp"
+
+TEST_CASE( "Create script variable", "[integration]" ) {
+    Script* script = Script::Create("foo = true");
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    auto variable = script->GetVariable("foo");
+    REQUIRE(variable == nullptr);
+}
+
+
+#endif
diff --git a/tests/parser/ParserTests.cpp b/tests/parser/ParserTests.cpp
index 1f9ce70..4455fe3 100644
--- a/tests/parser/ParserTests.cpp
+++ b/tests/parser/ParserTests.cpp
@@ -168,7 +168,7 @@ TEST_CASE( "Parse Global Assignment", "[parser]" ) {
     REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Assignment);
     auto assignment = (ParsedAssignmentStatement*)firstStatement;
     REQUIRE(!assignment -> IsLocal());
-    REQUIRE(assignment->GetIdentifier() == "foo");
+    REQUIRE(assignment->GetIdentifier().GetHash() == HashedString("foo").GetHash());
     REQUIRE(((LiteralBoolExpression*)assignment->GetExpression()) -> GetValue());
 }
 
@@ -187,7 +187,7 @@ TEST_CASE( "Parse local Assignment", "[parser]" ) {
     REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Assignment);
     auto assignment = (ParsedAssignmentStatement*)firstStatement;
     REQUIRE(assignment -> IsLocal());
-    REQUIRE(assignment->GetIdentifier() == "foo");
+    REQUIRE(assignment->GetIdentifier().GetHash() == HashedString("foo").GetHash());
     REQUIRE(((LiteralBoolExpression*)assignment->GetExpression()) -> GetValue());
 }