diff --git a/docs/reference/slate/schema.md b/docs/reference/slate/schema.md
index 0afd9c2c5..a2c866333 100644
--- a/docs/reference/slate/schema.md
+++ b/docs/reference/slate/schema.md
@@ -233,15 +233,20 @@ Will validate a node's parent against a [`match`](#match).
 
 ### `text`
 
-`Array`
+`RegExp|Function`
 
 ```js
 {
   text: /^\w+$/
 }
 ```
+```js
+{
+  text: string => string === 'valid'
+}
+```
 
-Will validate a node's text with a regex.
+Will validate a node's text with a regex or function.
 
 ## Static Methods
 
diff --git a/packages/slate/src/models/schema.js b/packages/slate/src/models/schema.js
index c993a338e..607b96af3 100644
--- a/packages/slate/src/models/schema.js
+++ b/packages/slate/src/models/schema.js
@@ -561,7 +561,8 @@ function validateMarks(node, rule) {
 function validateText(node, rule) {
   if (rule.text == null) return
   const { text } = node
-  const valid = rule.text.test(text)
+  const valid =
+    typeof rule.text === 'function' ? rule.text(text) : rule.text.test(text)
   if (valid) return
   return fail(NODE_TEXT_INVALID, { rule, node, text })
 }
diff --git a/packages/slate/test/schema/custom/node-text-invalid-function.js b/packages/slate/test/schema/custom/node-text-invalid-function.js
new file mode 100644
index 000000000..3d82cd3fb
--- /dev/null
+++ b/packages/slate/test/schema/custom/node-text-invalid-function.js
@@ -0,0 +1,25 @@
+/** @jsx h */
+
+import h from '../../helpers/h'
+
+export const schema = {
+  blocks: {
+    paragraph: {
+      text: t => t === 'valid',
+    },
+  },
+}
+
+export const input = (
+  <value>
+    <document>
+      <paragraph>invalid</paragraph>
+    </document>
+  </value>
+)
+
+export const output = (
+  <value>
+    <document />
+  </value>
+)
diff --git a/packages/slate/test/schema/custom/node-text-valid-function.js b/packages/slate/test/schema/custom/node-text-valid-function.js
new file mode 100644
index 000000000..daaf0529a
--- /dev/null
+++ b/packages/slate/test/schema/custom/node-text-valid-function.js
@@ -0,0 +1,27 @@
+/** @jsx h */
+
+import h from '../../helpers/h'
+
+export const schema = {
+  blocks: {
+    paragraph: {
+      text: t => t === 'valid',
+    },
+  },
+}
+
+export const input = (
+  <value>
+    <document>
+      <paragraph>valid</paragraph>
+    </document>
+  </value>
+)
+
+export const output = (
+  <value>
+    <document>
+      <paragraph>valid</paragraph>
+    </document>
+  </value>
+)
diff --git a/packages/slate/test/schema/custom/node-text-valid.js b/packages/slate/test/schema/custom/node-text-valid.js
index c61abcc90..ae8bd9902 100644
--- a/packages/slate/test/schema/custom/node-text-valid.js
+++ b/packages/slate/test/schema/custom/node-text-valid.js
@@ -1,17 +1,11 @@
 /** @jsx h */
 
-import { NODE_TEXT_INVALID } from 'slate-schema-violations'
 import h from '../../helpers/h'
 
 export const schema = {
   blocks: {
     paragraph: {
       text: /^\d*$/,
-      normalize: (change, { code, node }) => {
-        if (code == NODE_TEXT_INVALID) {
-          node.nodes.forEach(n => change.removeNodeByKey(n.key))
-        }
-      },
     },
   },
 }