diff --git a/packages/typegpu/tests/bufferUsage.test.ts b/packages/typegpu/tests/bufferUsage.test.ts
index 224d4c877c..ab7c537854 100644
--- a/packages/typegpu/tests/bufferUsage.test.ts
+++ b/packages/typegpu/tests/bufferUsage.test.ts
@@ -145,6 +145,29 @@ describe('TgpuBufferMutable', () => {
     `);
   });
 
+  it('cannot be mutated (primitive)', ({ root }) => {
+    const foo = root.createUniform(d.f32);
+
+    const main = () => {
+      'use gpu';
+      // @ts-expect-error
+      foo.$ += 1;
+    };
+
+    expect(() => tgpu.resolve([main])).toThrowErrorMatchingInlineSnapshot();
+  });
+
+  it('cannot be mutated (non-primitive)', ({ root }) => {
+    const foo = root.createUniform(d.vec3f);
+
+    const main = () => {
+      'use gpu';
+      foo.$.x += 1;
+    };
+
+    expect(() => tgpu.resolve([main])).toThrowErrorMatchingInlineSnapshot();
+  });
+
   describe('simulate mode', () => {
     it('allows accessing .$ in simulate mode', ({ root }) => {
       const buffer = root.createBuffer(d.u32, 0).$usage('storage');
@@ -260,6 +283,29 @@ describe('TgpuBufferReadonly', () => {
     `);
   });
 
+  it('cannot be mutated (primitive)', ({ root }) => {
+    const foo = root.createReadonly(d.f32);
+
+    const main = () => {
+      'use gpu';
+      // @ts-expect-error
+      foo.$ += 1;
+    };
+
+    expect(() => tgpu.resolve([main])).toThrowErrorMatchingInlineSnapshot();
+  });
+
+  it('cannot be mutated (non-primitive)', ({ root }) => {
+    const foo = root.createReadonly(d.vec3f);
+
+    const main = () => {
+      'use gpu';
+      foo.$.x += 1;
+    };
+
+    expect(() => tgpu.resolve([main])).toThrowErrorMatchingInlineSnapshot();
+  });
+
   describe('simulate mode', () => {
     it('allows accessing .$ in simulate mode', ({ root }) => {
       const buffer = root.createBuffer(d.f32, 123).$usage('storage');