diff --git a/Zend/tests/closure_041.phpt b/Zend/tests/closure_041.phpt
index 33cf03b14ce..cfe4f9487f6 100644
--- a/Zend/tests/closure_041.phpt
+++ b/Zend/tests/closure_041.phpt
@@ -80,6 +80,8 @@ scoped to A: bool(false)
 bound: no
 scoped to A: bool(true)
 bound: no
+
+Deprecated: Unbinding $this of closure is deprecated in %s on line %d
 scoped to A: bool(true)
 bound: no
 After binding, with same-class instance for the bound ones
diff --git a/Zend/tests/closure_044.phpt b/Zend/tests/closure_044.phpt
index c71204b1308..225d7540d2a 100644
--- a/Zend/tests/closure_044.phpt
+++ b/Zend/tests/closure_044.phpt
@@ -38,7 +38,7 @@ $d = $nonstaticUnscoped->bindTo(new A, 'A'); $d(); echo "\n";
 $d = $nonstaticScoped->bindTo(new A, 'A'); $d(); echo "\n";
 
 echo "Done.\n";
---EXPECT--
+--EXPECTF--
 Before binding
 bool(false)
 bool(false)
@@ -50,6 +50,8 @@ After binding, null scope, no instance
 bool(false)
 bool(false)
 
+
+Deprecated: Unbinding $this of closure is deprecated in %s on line %d
 bool(false)
 bool(false)
 
@@ -64,6 +66,8 @@ After binding, with scope, no instance
 bool(true)
 bool(false)
 
+
+Deprecated: Unbinding $this of closure is deprecated in %s on line %d
 bool(true)
 bool(false)
 
diff --git a/Zend/tests/closure_046.phpt b/Zend/tests/closure_046.phpt
index ef8aff4bbce..e10cc1b57e7 100644
--- a/Zend/tests/closure_046.phpt
+++ b/Zend/tests/closure_046.phpt
@@ -38,7 +38,7 @@ echo "After binding, with different instance for the bound one", "\n";
 $d = $nonstaticScoped->bindTo(new B, "static"); $d(); echo "\n";
 
 echo "Done.\n";
---EXPECT--
+--EXPECTF--
 Before binding
 bool(false)
 bool(false)
@@ -50,6 +50,8 @@ After binding, no instance
 bool(false)
 bool(false)
 
+
+Deprecated: Unbinding $this of closure is deprecated in %s on line %d
 bool(true)
 bool(false)
 
diff --git a/Zend/tests/no_class_const_propagation_in_closures.phpt b/Zend/tests/no_class_const_propagation_in_closures.phpt
index e446573b9d8..89d48e2d835 100644
--- a/Zend/tests/no_class_const_propagation_in_closures.phpt
+++ b/Zend/tests/no_class_const_propagation_in_closures.phpt
@@ -18,7 +18,7 @@ class B {
 }
 
 $f = (new A)->f();
-var_dump($f->bindTo(null, 'B')());
+var_dump($f->bindTo(new B, 'B')());
 
 ?>
 --EXPECT--
diff --git a/Zend/zend_closures.c b/Zend/zend_closures.c
index e8688a6fd1a..a8c4a898627 100644
--- a/Zend/zend_closures.c
+++ b/Zend/zend_closures.c
@@ -90,6 +90,9 @@ static zend_bool zend_valid_closure_binding(
 		} else {
 			zend_error(E_DEPRECATED, "Unbinding $this of a method is deprecated");
 		}
+	} else if (!is_fake_closure && !Z_ISUNDEF(closure->this_ptr)) {
+		// TODO: Only deprecate if it had $this *originally*?
+		zend_error(E_DEPRECATED, "Unbinding $this of closure is deprecated");
 	}
 
 	if (scope && scope != func->common.scope && scope->type == ZEND_INTERNAL_CLASS) {