diff --git a/tests/src/form.tsx b/tests/src/form.tsx
index 96336c6..3bc6d58 100644
--- a/tests/src/form.tsx
+++ b/tests/src/form.tsx
@@ -1,7 +1,13 @@
 /** biome-ignore-all lint/a11y/useAriaPropsSupportedByRole: pre aria-label */
 
 import type { JSXElement } from "solid-js";
-import { type CreateFormReturn, createForm, type FormValues, type SubmitHandler } from "./import";
+import {
+  type CreateFormReturn,
+  createForm,
+  type FormValues,
+  type SubmitErrorHandler,
+  type SubmitHandler
+} from "./import";
 
 type FormProps<F extends FormValues> = {
   defaultValues: F;
@@ -10,6 +16,7 @@ type FormProps<F extends FormValues> = {
   render: (form: CreateFormReturn<F>) => JSXElement;
   submitButton?: (form: CreateFormReturn<F>) => JSXElement;
   onSubmit: SubmitHandler<F>;
+  onError?: SubmitErrorHandler<F>;
   onReset?(form: CreateFormReturn<F>): void;
 };
 
@@ -27,7 +34,7 @@ export const Form = <F extends FormValues>(props: FormProps<F>) => {
     <div>
       <form
         style={{ display: "flex", "flex-direction": "column", gap: "32px" }}
-        onSubmit={handleSubmit(props.onSubmit)}
+        onSubmit={handleSubmit(props.onSubmit, props.onError)}
       >
         {props.render(form)}
 
diff --git a/tests/src/getValues/getValues.test.tsx b/tests/src/getValues/getValues.test.tsx
new file mode 100644
index 0000000..70e6fd6
--- /dev/null
+++ b/tests/src/getValues/getValues.test.tsx
@@ -0,0 +1,90 @@
+import { render } from "vitest-browser-solid";
+import { Form } from "../form";
+import { Input } from "../input";
+
+const onSubmit = vi.fn(() => {});
+const onGetValue = vi.fn();
+const onGetAllValues = vi.fn();
+
+beforeEach(() => {
+  vi.resetAllMocks();
+});
+
+describe("getValues", () => {
+  it("should get single field value by name", async () => {
+    const page = render(() => (
+      <Form
+        defaultValues={{
+          email: "",
+          password: ""
+        }}
+        render={({ getValues, register }) => (
+          <>
+            <Input {...register("email")} />
+            <Input {...register("password")} />
+            <button type="button" onClick={() => onGetValue(getValues("email"))}>
+              Get email value
+            </button>
+          </>
+        )}
+        onSubmit={onSubmit}
+      />
+    ));
+
+    const emailInput = page.getByRole("textbox", { name: "email" });
+    const getButton = page.getByRole("button", { name: "Get email value" });
+
+    await getButton.click();
+    expect(onGetValue).toHaveBeenCalledWith("");
+
+    await emailInput.fill("user@example.com");
+    await getButton.click();
+    expect(onGetValue).toHaveBeenCalledWith("user@example.com");
+
+    await emailInput.fill("123");
+    await getButton.click();
+    expect(onGetValue).toHaveBeenCalledWith("123");
+  });
+
+  it("should get all fields values", async () => {
+    const page = render(() => (
+      <Form
+        defaultValues={{
+          email: "",
+          password: ""
+        }}
+        render={({ getValues, register }) => (
+          <>
+            <Input {...register("email")} />
+            <Input {...register("password")} />
+            <button type="button" onClick={() => onGetAllValues(getValues())}>
+              Get all values
+            </button>
+          </>
+        )}
+        onSubmit={onSubmit}
+      />
+    ));
+
+    const emailInput = page.getByRole("textbox", { name: "email" });
+    const passwordInput = page.getByRole("textbox", { name: "password" });
+    const getButton = page.getByRole("button", { name: "Get all values" });
+
+    await getButton.click();
+    expect(onGetAllValues).toHaveBeenCalledWith({ email: "", password: "" });
+
+    await emailInput.fill("user@example.com");
+    await getButton.click();
+    expect(onGetAllValues).toHaveBeenCalledWith({
+      email: "user@example.com",
+      password: ""
+    });
+
+    await passwordInput.fill("secret");
+    await getButton.click();
+    expect(onGetAllValues).toHaveBeenCalledWith({
+      email: "user@example.com",
+      password: "secret"
+    });
+  });
+});
diff --git a/tests/src/setValue/setValue.test.tsx b/tests/src/setValue/setValue.test.tsx
new file mode 100644
index 0000000..6c50eb5
--- /dev/null
+++ b/tests/src/setValue/setValue.test.tsx
@@ -0,0 +1,94 @@
+import { render } from "vitest-browser-solid";
+import { Form } from "../form";
+import { Input } from "../input";
+
+const onSubmit = vi.fn(() => {});
+const errorMessage = "This field is required";
+const validValue = "valid@example.com";
+
+beforeEach(() => {
+  vi.resetAllMocks();
+});
+
+describe("setValue", () => {
+  it("should setValue", async () => {
+    const page = render(() => (
+      <Form
+        defaultValues={{
+          email: ""
+        }}
+        render={({ errors, register, setValue }) => (
+          <>
+            <Input {...register("email", { required: errorMessage })} error={errors.email} />
+
+            <button type="button" onClick={() => setValue("email", "")}>
+              Set invalid
+            </button>
+            <button type="button" onClick={() => setValue("email", validValue)}>
+              Set valid
+            </button>
+          </>
+        )}
+        onSubmit={onSubmit}
+      />
+    ));
+
+    const input = page.getByRole("textbox", { name: "email" });
+    const setInvalidButton = page.getByRole("button", { name: "Set invalid" });
+    const setValidButton = page.getByRole("button", { name: "Set valid" });
+
+    expect(input).toHaveValue("");
+    expect(input).toHaveAttribute("aria-invalid", "false");
+
+    await setInvalidButton.click();
+    expect(input).toHaveAttribute("aria-invalid", "false");
+    expect(input).not.toHaveAccessibleErrorMessage();
+
+    await setValidButton.click();
+    expect(input).toHaveValue(validValue);
+    expect(input).toHaveAttribute("aria-invalid", "false");
+    expect(input).not.toHaveAccessibleErrorMessage();
+  });
+
+  it("should setValue and validate", async () => {
+    const page = render(() => (
+      <Form
+        defaultValues={{
+          email: ""
+        }}
+        render={({ errors, register, setValue }) => (
+          <>
+            <Input {...register("email", { required: errorMessage })} error={errors.email} />
+
+            <button type="button" onClick={() => setValue("email", "", { shouldValidate: true })}>
+              Set invalid
+            </button>
+            <button
+              type="button"
+              onClick={() => setValue("email", validValue, { shouldValidate: true })}
+            >
+              Set valid
+            </button>
+          </>
+        )}
+        onSubmit={onSubmit}
+      />
+    ));
+
+    const input = page.getByRole("textbox", { name: "email" });
+    const setInvalidButton = page.getByRole("button", { name: "Set invalid" });
+    const setValidButton = page.getByRole("button", { name: "Set valid" });
+
+    expect(input).toHaveValue("");
+    expect(input).toHaveAttribute("aria-invalid", "false");
+
+    await setInvalidButton.click();
+    expect(input).toHaveAttribute("aria-invalid", "true");
+    expect(input).toHaveAccessibleErrorMessage(errorMessage);
+
+    await setValidButton.click();
+    expect(input).toHaveValue(validValue);
+    expect(input).toHaveAttribute("aria-invalid", "false");
+    expect(input).not.toHaveAccessibleErrorMessage();
+  });
+});
diff --git a/tests/src/submit/submit.test.tsx b/tests/src/submit/submit.test.tsx
index d17377b..467dae5 100644
--- a/tests/src/submit/submit.test.tsx
+++ b/tests/src/submit/submit.test.tsx
@@ -4,6 +4,7 @@ import { Form } from "../form";
 import { Input } from "../input";
 
 const onSubmit = vi.fn(() => {});
+const onError = vi.fn(() => {});
 
 beforeEach(() => {
   vi.resetAllMocks();
@@ -63,4 +64,30 @@ describe("submit", () => {
     expect(onSubmit).toHaveBeenCalled();
     expect(submitCount).toHaveTextContent("2");
   });
+
+  it("should call onError", async () => {
+    const page = render(() => (
+      <Form
+        defaultValues={{
+          email: ""
+        }}
+        render={({ register }) => (
+          <Input {...register("email", { required: "Email is required" })} />
+        )}
+        onSubmit={onSubmit}
+        onError={onError}
+      />
+    ));
+
+    const submitButton = page.getByRole("button", { name: "Submit" });
+    await submitButton.click();
+
+    expect(onError).toHaveBeenCalledTimes(1);
+    expect(onError).toHaveBeenCalledWith(
+      expect.objectContaining({
+        email: expect.objectContaining({ message: "Email is required" })
+      })
+    );
+    expect(onSubmit).not.toHaveBeenCalled();
+  });
 });