diff --git a/lib/query-validation-visitor.js b/lib/query-validation-visitor.js
index 22f8e4b..5dcb736 100644
--- a/lib/query-validation-visitor.js
+++ b/lib/query-validation-visitor.js
@@ -54,12 +54,14 @@ module.exports = class QueryValidationVisitor {
     }
 
     // Get variable values from variables that are passed from options, merged with default values defined in the operation
-    this.variableValues = getVariableValues(
+    const {coerced, errors} = getVariableValues(
       this.context.getSchema(),
       // We have to create a new array here because input argument is not readonly in graphql ~14.6.0
       operation.variableDefinitions ? [...operation.variableDefinitions] : [],
       this.options.variables ?? {}
-    ).coerced
+    )
+    if (errors?.length > 0) throw errors
+    this.variableValues = coerced
 
     // prepare basic this.currentTypeInfo based on the operation
     let typeDef