diff --git a/compiler/integration-tests/test/browser/recursion.test.ts b/compiler/integration-tests/test/browser/recursion.test.ts
index c773e80ea43..bdc44d8db5a 100644
--- a/compiler/integration-tests/test/browser/recursion.test.ts
+++ b/compiler/integration-tests/test/browser/recursion.test.ts
@@ -9,6 +9,7 @@ import { acvm, abi, generateWitness } from '@noir-lang/noir_js';
 import * as TOML from 'smol-toml';
 import { BarretenbergBackend } from '@noir-lang/backend_barretenberg';
 import { getFile } from './utils.js';
+import { Field, InputMap } from '@noir-lang/noirc_abi';
 
 const logger = new Logger({ name: 'test', minLevel: TEST_LOG_LEVEL });
 
@@ -50,7 +51,7 @@ describe('It compiles noir program code, receiving circuit bytes and abi object.
 
   it('Should generate valid inner proof for correct input, then verify proof within a proof', async () => {
     const main_program = await getCircuit(circuit_main_source);
-    const main_inputs = TOML.parse(circuit_main_toml);
+    const main_inputs: InputMap = TOML.parse(circuit_main_toml) as InputMap;
 
     const main_backend = new BarretenbergBackend(main_program);
 
@@ -69,10 +70,10 @@ describe('It compiles noir program code, receiving circuit bytes and abi object.
       numPublicInputs,
     );
 
-    const recursion_inputs = {
+    const recursion_inputs: InputMap = {
       verification_key: vkAsFields,
       proof: proofAsFields,
-      public_inputs: [main_inputs.y],
+      public_inputs: [main_inputs.y as Field],
       key_hash: vkHash,
       input_aggregation_object: ['0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'],
     };
diff --git a/tooling/noir_js/src/witness_generation.ts b/tooling/noir_js/src/witness_generation.ts
index 3b1dfd90109..f3307837736 100644
--- a/tooling/noir_js/src/witness_generation.ts
+++ b/tooling/noir_js/src/witness_generation.ts
@@ -1,13 +1,13 @@
-import { abiEncode } from '@noir-lang/noirc_abi';
+import { abiEncode, InputMap } from '@noir-lang/noirc_abi';
 import { base64Decode } from './base64_decode.js';
 import { executeCircuit } from '@noir-lang/acvm_js';
 import { witnessMapToUint8Array } from './serialize.js';
 import { CompiledCircuit } from '@noir-lang/types';
 
 // Generates the witnesses needed to feed into the chosen proving system
-export async function generateWitness(compiledProgram: CompiledCircuit, inputs: unknown): Promise<Uint8Array> {
+export async function generateWitness(compiledProgram: CompiledCircuit, inputs: InputMap): Promise<Uint8Array> {
   // Throws on ABI encoding error
-  const witnessMap = abiEncode(compiledProgram.abi, inputs, null);
+  const witnessMap = abiEncode(compiledProgram.abi, inputs);
 
   // Execute the circuit to generate the rest of the witnesses and serialize
   // them into a Uint8Array.
diff --git a/tooling/noir_js/test/node/e2e.test.ts b/tooling/noir_js/test/node/e2e.test.ts
index fe0d26c7e3b..5e6b566121e 100644
--- a/tooling/noir_js/test/node/e2e.test.ts
+++ b/tooling/noir_js/test/node/e2e.test.ts
@@ -3,6 +3,9 @@ import assert_lt_json from '../noir_compiled_examples/assert_lt/target/assert_lt
 import { generateWitness } from '../../src/index.js';
 import { Noir } from '../../src/program.js';
 import { BarretenbergBackend as Backend } from '@noir-lang/backend_barretenberg';
+import { CompiledCircuit } from '@noir-lang/types';
+
+const assert_lt_program = assert_lt_json as CompiledCircuit;
 
 it('end-to-end proof creation and verification (outer)', async () => {
   // Noir.Js part
@@ -10,12 +13,12 @@ it('end-to-end proof creation and verification (outer)', async () => {
     x: '2',
     y: '3',
   };
-  const serializedWitness = await generateWitness(assert_lt_json, inputs);
+  const serializedWitness = await generateWitness(assert_lt_program, inputs);
 
   // bb.js part
   //
   // Proof creation
-  const prover = new Backend(assert_lt_json);
+  const prover = new Backend(assert_lt_program);
   const proof = await prover.generateFinalProof(serializedWitness);
 
   // Proof verification
@@ -31,9 +34,9 @@ it('end-to-end proof creation and verification (outer) -- Program API', async ()
   };
 
   // Initialize backend
-  const backend = new Backend(assert_lt_json);
+  const backend = new Backend(assert_lt_program);
   // Initialize program
-  const program = new Noir(assert_lt_json, backend);
+  const program = new Noir(assert_lt_program, backend);
   // Generate proof
   const proof = await program.generateFinalProof(inputs);
 
@@ -48,12 +51,12 @@ it('end-to-end proof creation and verification (inner)', async () => {
     x: '2',
     y: '3',
   };
-  const serializedWitness = await generateWitness(assert_lt_json, inputs);
+  const serializedWitness = await generateWitness(assert_lt_program, inputs);
 
   // bb.js part
   //
   // Proof creation
-  const prover = new Backend(assert_lt_json);
+  const prover = new Backend(assert_lt_program);
   const proof = await prover.generateIntermediateProof(serializedWitness);
 
   // Proof verification
@@ -79,15 +82,15 @@ it('[BUG] -- bb.js null function or function signature mismatch (different insta
     x: '2',
     y: '3',
   };
-  const serializedWitness = await generateWitness(assert_lt_json, inputs);
+  const serializedWitness = await generateWitness(assert_lt_program, inputs);
 
   // bb.js part
-  const prover = new Backend(assert_lt_json);
+  const prover = new Backend(assert_lt_program);
 
   const proof = await prover.generateFinalProof(serializedWitness);
 
   try {
-    const verifier = new Backend(assert_lt_json);
+    const verifier = new Backend(assert_lt_program);
     await verifier.verifyFinalProof(proof);
     expect.fail(
       'bb.js currently returns a bug when we try to verify a proof with a different Barretenberg instance that created it.',
@@ -111,13 +114,13 @@ it('[BUG] -- bb.js null function or function signature mismatch (outer-inner) ',
     x: '2',
     y: '3',
   };
-  const serializedWitness = await generateWitness(assert_lt_json, inputs);
+  const serializedWitness = await generateWitness(assert_lt_program, inputs);
 
   // bb.js part
   //
   // Proof creation
   //
-  const prover = new Backend(assert_lt_json);
+  const prover = new Backend(assert_lt_program);
   // Create a proof using both proving systems, the majority of the time
   // one would only use outer proofs.
   const proofOuter = await prover.generateFinalProof(serializedWitness);
diff --git a/tooling/noir_js/test/node/smoke.test.ts b/tooling/noir_js/test/node/smoke.test.ts
index 4b0291c0f41..931416b2e26 100644
--- a/tooling/noir_js/test/node/smoke.test.ts
+++ b/tooling/noir_js/test/node/smoke.test.ts
@@ -1,13 +1,16 @@
 import { expect } from 'chai';
 import assert_lt_json from '../noir_compiled_examples/assert_lt/target/assert_lt.json' assert { type: 'json' };
 import { generateWitness } from '../../src/index.js';
+import { CompiledCircuit } from '@noir-lang/types';
+
+const assert_lt_program = assert_lt_json as CompiledCircuit;
 
 it('generates witnesses successfully', async () => {
   const inputs = {
     x: '2',
     y: '3',
   };
-  expect(() => generateWitness(assert_lt_json, inputs)).to.not.throw;
+  expect(() => generateWitness(assert_lt_program, inputs)).to.not.throw;
 });
 
 it('string input and number input are the same', async () => {
@@ -19,8 +22,8 @@ it('string input and number input are the same', async () => {
     x: 2,
     y: 3,
   };
-  const solvedWitnessString = await generateWitness(assert_lt_json, inputsString);
-  const solvedWitnessNumber = await generateWitness(assert_lt_json, inputsNumber);
+  const solvedWitnessString = await generateWitness(assert_lt_program, inputsString);
+  const solvedWitnessNumber = await generateWitness(assert_lt_program, inputsNumber);
   expect(solvedWitnessString).to.deep.equal(solvedWitnessNumber);
 });
 
@@ -34,8 +37,8 @@ it('string input and number input are the same', async () => {
     y: 3,
   };
 
-  const solvedWitnessString = await generateWitness(assert_lt_json, inputsString);
-  const solvedWitnessNumber = await generateWitness(assert_lt_json, inputsNumber);
+  const solvedWitnessString = await generateWitness(assert_lt_program, inputsString);
+  const solvedWitnessNumber = await generateWitness(assert_lt_program, inputsNumber);
   expect(solvedWitnessString).to.deep.equal(solvedWitnessNumber);
 });
 
@@ -46,7 +49,7 @@ it('0x prefixed string input for inputs will throw', async () => {
   };
 
   try {
-    await generateWitness(assert_lt_json, inputsHexPrefix);
+    await generateWitness(assert_lt_program, inputsHexPrefix);
     expect.fail('Expected generatedWitness to throw, due to inputs being prefixed with 0x. Currently not supported');
   } catch (error) {
     // Successfully errored due to 0x not being supported. Update this test once/if we choose
@@ -62,7 +65,7 @@ describe('input validation', () => {
     };
 
     try {
-      await generateWitness(assert_lt_json, inputs);
+      await generateWitness(assert_lt_program, inputs);
       expect.fail('Expected generatedWitness to throw, due to x not being convertible to a uint64');
     } catch (error) {
       const knownError = error as Error;
diff --git a/tooling/noir_js_types/package.json b/tooling/noir_js_types/package.json
index eb913f16ca3..f4801a546c7 100644
--- a/tooling/noir_js_types/package.json
+++ b/tooling/noir_js_types/package.json
@@ -28,6 +28,9 @@
       "types": "./lib/esm/types.d.ts"
     }
   },
+  "dependencies": {
+    "@noir-lang/noirc_abi": "workspace:*"
+  },
   "devDependencies": {
     "@types/prettier": "^3",
     "eslint": "^8.50.0",
diff --git a/tooling/noir_js_types/src/types.ts b/tooling/noir_js_types/src/types.ts
index 357e440f155..6285972d1e9 100644
--- a/tooling/noir_js_types/src/types.ts
+++ b/tooling/noir_js_types/src/types.ts
@@ -1,3 +1,5 @@
+import { Abi } from '@noir-lang/noirc_abi';
+
 export interface Backend {
   // Generate an outer proof. This is the proof for the circuit which will verify
   // inner proofs and or can be seen as the proof created for regular circuits.
@@ -19,5 +21,5 @@ export type ProofData = {
 
 export type CompiledCircuit = {
   bytecode: string;
-  abi: object;
+  abi: Abi;
 };
diff --git a/tooling/noirc_abi_wasm/src/lib.rs b/tooling/noirc_abi_wasm/src/lib.rs
index 2b1fc672fc4..24e0e6506fb 100644
--- a/tooling/noirc_abi_wasm/src/lib.rs
+++ b/tooling/noirc_abi_wasm/src/lib.rs
@@ -22,28 +22,83 @@ use errors::JsAbiError;
 use js_witness_map::JsWitnessMap;
 use temp::{input_value_from_json_type, JsonTypes};
 
+#[wasm_bindgen(typescript_custom_section)]
+const INPUT_MAP: &'static str = r#"
+export type Field = string | number | boolean;
+export type InputValue = Field | Field[] | InputMap;
+export type InputMap = { [key: string]: InputValue };
+"#;
+
+#[wasm_bindgen]
+extern "C" {
+    #[wasm_bindgen(extends = js_sys::Object, js_name = "InputMap", typescript_type = "InputMap")]
+    #[derive(Clone, Debug, PartialEq, Eq)]
+    pub type JsInputMap;
+}
+
+#[wasm_bindgen]
+extern "C" {
+    #[wasm_bindgen(extends = js_sys::Object, js_name = "InputValue", typescript_type = "InputValue")]
+    #[derive(Clone, Debug, PartialEq, Eq)]
+    pub type JsInputValue;
+}
+
+#[wasm_bindgen(typescript_custom_section)]
+const ABI: &'static str = r#"
+export type Visibility = "public" | "private";
+export type Sign = "unsigned" | "signed";
+export type AbiType = 
+    { kind: "field" } |
+    { kind: "boolean" } |
+    { kind: "string", length: number } |
+    { kind: "integer", sign: Sign, width: number } |
+    { kind: "array", length: number, type: AbiType } |
+    { kind: "tuple", fields: AbiType[] } |
+    { kind: "struct", path: string, fields: [string, AbiType][] };
+    
+export type AbiParameter = {
+    name: string,
+    type: AbiType,
+    visibility: Visibility,
+};
+    
+export type Abi = {
+    parameters: AbiParameter[],
+    param_witnesses: Record<string, number[]>,
+    return_type: AbiType | null,
+    return_witnesses: number[],
+}
+"#;
+
+#[wasm_bindgen]
+extern "C" {
+    #[wasm_bindgen(extends = js_sys::Object, js_name = "Abi", typescript_type = "Abi")]
+    #[derive(Clone, Debug, PartialEq, Eq)]
+    pub type JsAbi;
+}
+
 #[wasm_bindgen(js_name = abiEncode)]
 pub fn abi_encode(
-    abi: JsValue,
-    inputs: JsValue,
-    return_value: JsValue,
+    abi: JsAbi,
+    inputs: JsInputMap,
+    return_value: Option<JsInputValue>,
 ) -> Result<JsWitnessMap, JsAbiError> {
     console_error_panic_hook::set_once();
-    let abi: Abi = JsValueSerdeExt::into_serde(&abi).map_err(|err| err.to_string())?;
+    let abi: Abi =
+        JsValueSerdeExt::into_serde(&JsValue::from(abi)).map_err(|err| err.to_string())?;
     let inputs: BTreeMap<String, JsonTypes> =
-        JsValueSerdeExt::into_serde(&inputs).map_err(|err| err.to_string())?;
-    let return_value: Option<InputValue> = if return_value.is_undefined() || return_value.is_null()
-    {
-        None
-    } else {
-        let toml_return_value =
-            JsValueSerdeExt::into_serde(&return_value).expect("could not decode return value");
-        Some(input_value_from_json_type(
-            toml_return_value,
-            abi.return_type.as_ref().unwrap(),
-            MAIN_RETURN_NAME,
-        )?)
-    };
+        JsValueSerdeExt::into_serde(&JsValue::from(inputs)).map_err(|err| err.to_string())?;
+    let return_value: Option<InputValue> = return_value
+        .map(|return_value| {
+            let toml_return_value = JsValueSerdeExt::into_serde(&JsValue::from(return_value))
+                .expect("could not decode return value");
+            input_value_from_json_type(
+                toml_return_value,
+                abi.return_type.as_ref().unwrap(),
+                MAIN_RETURN_NAME,
+            )
+        })
+        .transpose()?;
 
     let abi_map = abi.to_btree_map();
     let parsed_inputs: BTreeMap<String, InputValue> =
@@ -62,9 +117,10 @@ pub fn abi_encode(
 }
 
 #[wasm_bindgen(js_name = abiDecode)]
-pub fn abi_decode(abi: JsValue, witness_map: JsWitnessMap) -> Result<JsValue, JsAbiError> {
+pub fn abi_decode(abi: JsAbi, witness_map: JsWitnessMap) -> Result<JsValue, JsAbiError> {
     console_error_panic_hook::set_once();
-    let abi: Abi = JsValueSerdeExt::into_serde(&abi).map_err(|err| err.to_string())?;
+    let abi: Abi =
+        JsValueSerdeExt::into_serde(&JsValue::from(abi)).map_err(|err| err.to_string())?;
 
     let witness_map = WitnessMap::from(witness_map);
 
diff --git a/tooling/noirc_abi_wasm/test/browser/abi_encode.test.ts b/tooling/noirc_abi_wasm/test/browser/abi_encode.test.ts
index 5e604aa5b66..e1aaf0dc2c0 100644
--- a/tooling/noirc_abi_wasm/test/browser/abi_encode.test.ts
+++ b/tooling/noirc_abi_wasm/test/browser/abi_encode.test.ts
@@ -1,5 +1,5 @@
 import { expect } from '@esm-bundle/chai';
-import initNoirAbi, { abiEncode, abiDecode, WitnessMap } from '@noir-lang/noirc_abi';
+import initNoirAbi, { abiEncode, abiDecode, WitnessMap, Field } from '@noir-lang/noirc_abi';
 import { DecodedInputs } from '../types';
 
 beforeEach(async () => {
@@ -9,11 +9,13 @@ beforeEach(async () => {
 it('recovers original inputs when abi encoding and decoding', async () => {
   const { abi, inputs } = await import('../shared/abi_encode');
 
-  const initial_witness: WitnessMap = abiEncode(abi, inputs, null);
+  const initial_witness: WitnessMap = abiEncode(abi, inputs);
   const decoded_inputs: DecodedInputs = abiDecode(abi, initial_witness);
 
-  expect(BigInt(decoded_inputs.inputs.foo)).to.be.equal(BigInt(inputs.foo));
-  expect(BigInt(decoded_inputs.inputs.bar[0])).to.be.equal(BigInt(inputs.bar[0]));
-  expect(BigInt(decoded_inputs.inputs.bar[1])).to.be.equal(BigInt(inputs.bar[1]));
+  const foo: Field = inputs.foo as Field;
+  const bar: Field[] = inputs.bar as Field[];
+  expect(BigInt(decoded_inputs.inputs.foo)).to.be.equal(BigInt(foo));
+  expect(BigInt(decoded_inputs.inputs.bar[0])).to.be.equal(BigInt(bar[0]));
+  expect(BigInt(decoded_inputs.inputs.bar[1])).to.be.equal(BigInt(bar[1]));
   expect(decoded_inputs.return_value).to.be.null;
 });
diff --git a/tooling/noirc_abi_wasm/test/browser/errors.test.ts b/tooling/noirc_abi_wasm/test/browser/errors.test.ts
index 5f9b40a195c..429a2d446a3 100644
--- a/tooling/noirc_abi_wasm/test/browser/errors.test.ts
+++ b/tooling/noirc_abi_wasm/test/browser/errors.test.ts
@@ -8,7 +8,7 @@ beforeEach(async () => {
 it('errors when an integer input overflows', async () => {
   const { abi, inputs } = await import('../shared/uint_overflow');
 
-  expect(() => abiEncode(abi, inputs, null)).to.throw(
+  expect(() => abiEncode(abi, inputs)).to.throw(
     'The parameter foo is expected to be a Integer { sign: Unsigned, width: 32 } but found incompatible value Field(2³⁸)',
   );
 });
@@ -16,11 +16,11 @@ it('errors when an integer input overflows', async () => {
 it('errors when passing a field in place of an array', async () => {
   const { abi, inputs } = await import('../shared/field_as_array');
 
-  expect(() => abiEncode(abi, inputs, null)).to.throw('cannot parse value into Array { length: 2, typ: Field }');
+  expect(() => abiEncode(abi, inputs)).to.throw('cannot parse value into Array { length: 2, typ: Field }');
 });
 
 it('errors when passing an array in place of a field', async () => {
   const { abi, inputs } = await import('../shared/array_as_field');
 
-  expect(() => abiEncode(abi, inputs, null)).to.throw('cannot parse value into Field');
+  expect(() => abiEncode(abi, inputs)).to.throw('cannot parse value into Field');
 });
diff --git a/tooling/noirc_abi_wasm/test/node/abi_encode.test.ts b/tooling/noirc_abi_wasm/test/node/abi_encode.test.ts
index 830e45cf10b..a49c10b6ea6 100644
--- a/tooling/noirc_abi_wasm/test/node/abi_encode.test.ts
+++ b/tooling/noirc_abi_wasm/test/node/abi_encode.test.ts
@@ -1,15 +1,17 @@
 import { expect } from 'chai';
-import { abiEncode, abiDecode, WitnessMap } from '@noir-lang/noirc_abi';
+import { abiEncode, abiDecode, WitnessMap, Field } from '@noir-lang/noirc_abi';
 import { DecodedInputs } from '../types';
 
 it('recovers original inputs when abi encoding and decoding', async () => {
   const { abi, inputs } = await import('../shared/abi_encode');
 
-  const initial_witness: WitnessMap = abiEncode(abi, inputs, null);
+  const initial_witness: WitnessMap = abiEncode(abi, inputs);
   const decoded_inputs: DecodedInputs = abiDecode(abi, initial_witness);
 
-  expect(BigInt(decoded_inputs.inputs.foo)).to.be.equal(BigInt(inputs.foo));
-  expect(BigInt(decoded_inputs.inputs.bar[0])).to.be.equal(BigInt(inputs.bar[0]));
-  expect(BigInt(decoded_inputs.inputs.bar[1])).to.be.equal(BigInt(inputs.bar[1]));
+  const foo: Field = inputs.foo as Field;
+  const bar: Field[] = inputs.bar as Field[];
+  expect(BigInt(decoded_inputs.inputs.foo)).to.be.equal(BigInt(foo));
+  expect(BigInt(decoded_inputs.inputs.bar[0])).to.be.equal(BigInt(bar[0]));
+  expect(BigInt(decoded_inputs.inputs.bar[1])).to.be.equal(BigInt(bar[1]));
   expect(decoded_inputs.return_value).to.be.null;
 });
diff --git a/tooling/noirc_abi_wasm/test/node/errors.test.ts b/tooling/noirc_abi_wasm/test/node/errors.test.ts
index ee0670ab5be..0d007e64803 100644
--- a/tooling/noirc_abi_wasm/test/node/errors.test.ts
+++ b/tooling/noirc_abi_wasm/test/node/errors.test.ts
@@ -4,7 +4,7 @@ import { abiEncode } from '@noir-lang/noirc_abi';
 it('errors when an integer input overflows', async () => {
   const { abi, inputs } = await import('../shared/uint_overflow');
 
-  expect(() => abiEncode(abi, inputs, null)).to.throw(
+  expect(() => abiEncode(abi, inputs)).to.throw(
     'The parameter foo is expected to be a Integer { sign: Unsigned, width: 32 } but found incompatible value Field(2³⁸)',
   );
 });
@@ -12,11 +12,11 @@ it('errors when an integer input overflows', async () => {
 it('errors when passing a field in place of an array', async () => {
   const { abi, inputs } = await import('../shared/field_as_array');
 
-  expect(() => abiEncode(abi, inputs, null)).to.throw('cannot parse value into Array { length: 2, typ: Field }');
+  expect(() => abiEncode(abi, inputs)).to.throw('cannot parse value into Array { length: 2, typ: Field }');
 });
 
 it('errors when passing an array in place of a field', async () => {
   const { abi, inputs } = await import('../shared/array_as_field');
 
-  expect(() => abiEncode(abi, inputs, null)).to.throw('cannot parse value into Field');
+  expect(() => abiEncode(abi, inputs)).to.throw('cannot parse value into Field');
 });
diff --git a/tooling/noirc_abi_wasm/test/shared/abi_encode.ts b/tooling/noirc_abi_wasm/test/shared/abi_encode.ts
index 0f9c93a4f76..28379745dec 100644
--- a/tooling/noirc_abi_wasm/test/shared/abi_encode.ts
+++ b/tooling/noirc_abi_wasm/test/shared/abi_encode.ts
@@ -1,6 +1,6 @@
-// TODO: Add type definitions for these
+import { Abi, InputMap } from '@noir-lang/noirc_abi';
 
-export const abi = {
+export const abi: Abi = {
   parameters: [
     { name: 'foo', type: { kind: 'field' }, visibility: 'private' },
     {
@@ -14,7 +14,7 @@ export const abi = {
   return_witnesses: [],
 };
 
-export const inputs = {
+export const inputs: InputMap = {
   foo: '1',
   bar: ['1', '2'],
 };
diff --git a/tooling/noirc_abi_wasm/test/shared/array_as_field.ts b/tooling/noirc_abi_wasm/test/shared/array_as_field.ts
index 06e6a7beebf..ba58f075702 100644
--- a/tooling/noirc_abi_wasm/test/shared/array_as_field.ts
+++ b/tooling/noirc_abi_wasm/test/shared/array_as_field.ts
@@ -1,4 +1,6 @@
-export const abi = {
+import { Abi, InputMap } from '@noir-lang/noirc_abi';
+
+export const abi: Abi = {
   parameters: [
     {
       name: 'foo',
@@ -11,6 +13,6 @@ export const abi = {
   return_witnesses: [],
 };
 
-export const inputs = {
+export const inputs: InputMap = {
   foo: ['1', '2'],
 };
diff --git a/tooling/noirc_abi_wasm/test/shared/field_as_array.ts b/tooling/noirc_abi_wasm/test/shared/field_as_array.ts
index 89ae529d6b1..931720d5e1b 100644
--- a/tooling/noirc_abi_wasm/test/shared/field_as_array.ts
+++ b/tooling/noirc_abi_wasm/test/shared/field_as_array.ts
@@ -1,4 +1,6 @@
-export const abi = {
+import { Abi, InputMap } from '@noir-lang/noirc_abi';
+
+export const abi: Abi = {
   parameters: [
     {
       name: 'foo',
@@ -11,6 +13,6 @@ export const abi = {
   return_witnesses: [],
 };
 
-export const inputs = {
+export const inputs: InputMap = {
   foo: '1',
 };
diff --git a/tooling/noirc_abi_wasm/test/shared/uint_overflow.ts b/tooling/noirc_abi_wasm/test/shared/uint_overflow.ts
index 87f59b1440e..ee87e050b23 100644
--- a/tooling/noirc_abi_wasm/test/shared/uint_overflow.ts
+++ b/tooling/noirc_abi_wasm/test/shared/uint_overflow.ts
@@ -1,4 +1,6 @@
-export const abi = {
+import { Abi, InputMap } from '@noir-lang/noirc_abi';
+
+export const abi: Abi = {
   parameters: [
     {
       name: 'foo',
@@ -11,6 +13,6 @@ export const abi = {
   return_witnesses: [],
 };
 
-export const inputs = {
+export const inputs: InputMap = {
   foo: `0x${(1n << 38n).toString(16)}`,
 };