diff --git a/index.js b/index.js
index 32f6f194..946abf12 100644
--- a/index.js
+++ b/index.js
@@ -407,41 +407,46 @@ function buildArray (schema, code, name, externalSchema, fullSchema) {
     result = schema.items.reduce((res, item, i) => {
       var accessor = '[i]'
       const tmpRes = nested(laterCode, name, accessor, item, externalSchema, fullSchema, i)
-      var condition
+      var condition = `i === ${i} && `
       switch (item.type) {
         case 'null':
-          condition = `obj${accessor} === null`
+          condition += `obj${accessor} === null`
           break
         case 'string':
-          condition = `typeof obj${accessor} === 'string'`
+          condition += `typeof obj${accessor} === 'string'`
           break
         case 'integer':
-          condition = `Number.isInteger(obj${accessor})`
+          condition += `Number.isInteger(obj${accessor})`
           break
         case 'number':
-          condition = `!Number.isInteger(obj${accessor}) && Number.isFinite(obj${accessor})`
+          condition += `Number.isFinite(obj${accessor})`
           break
         case 'boolean':
-          condition = `typeof obj${accessor} === 'boolean'`
+          condition += `typeof obj${accessor} === 'boolean'`
           break
         case 'object':
-          condition = `obj${accessor} && typeof obj${accessor} === 'object' && obj${accessor}.constructor === Object`
+          condition += `obj${accessor} && typeof obj${accessor} === 'object' && obj${accessor}.constructor === Object`
           break
         case 'array':
-          condition = `Array.isArray(obj${accessor})`
+          condition += `Array.isArray(obj${accessor})`
           break
         default:
           throw new Error(`${item.type} unsupported`)
       }
       return {
         code: `${res.code}
-        if (${condition}) {
+        ${i > 0 ? 'else' : ''} if (${condition}) {
           ${tmpRes.code}
         }`,
         laterCode: `${res.laterCode}
         ${tmpRes.laterCode}`
       }
     }, result)
+    result.code += `
+    else {
+      throw new Error(\`Item at $\{i} does not match schema definition.\`)
+    }
+    `
   } else {
     result = nested(laterCode, name, '[i]', schema.items, externalSchema, fullSchema)
   }
diff --git a/test/array.test.js b/test/array.test.js
index f130368d..9223a8bd 100644
--- a/test/array.test.js
+++ b/test/array.test.js
@@ -94,3 +94,73 @@ buildTest({
 }, {
   ids: [null, 'test', 1, 1.1, true, {a: 'test'}, ['test']]
 })
+
+buildTest({
+  'title': 'repeated types',
+  'type': 'object',
+  'properties': {
+    'ids': {
+      'type': 'array',
+      'items': [
+        {
+          type: 'number'
+        },
+        {
+          type: 'number'
+        }
+      ]
+    }
+  }
+}, {ids: [1, 2]})
+
+buildTest({
+  'title': 'pattern properties array',
+  'type': 'object',
+  'properties': {
+    'args': {
+      'type': 'array',
+      'items': [
+        {
+          'type': 'object',
+          'patternProperties': {
+            '.*': {
+              'type': 'string'
+            }
+          }
+        },
+        {
+          'type': 'object',
+          'patternProperties': {
+            '.*': {
+              'type': 'number'
+            }
+          }
+        }
+      ]
+    }
+  }
+}, {args: [{a: 'test'}, {b: 1}]})
+
+test('invalid items throw', (t) => {
+  t.plan(1)
+  const schema = {
+    'type': 'object',
+    'properties': {
+      'args': {
+        'type': 'array',
+        'items': [
+          {
+            'type': 'object',
+            'patternProperties': {
+              '.*': {
+                'type': 'string'
+              }
+            }
+          }
+        ]
+      }
+    }
+  }
+  const stringify = build(schema)
+  t.throws(() => stringify({args: ['invalid']}))
+})