diff --git a/source/utils.js b/source/utils.js
index f80f5b52e..bcdec5ce4 100644
--- a/source/utils.js
+++ b/source/utils.js
@@ -23,8 +23,9 @@ export let getIframeOption = (optionName: string) => {
 	)
 }
 
-// By luck this works as expected for both null and undefined, * but with different branches failing :O *
-export let isFloat = (n: number) => Number(n) === n && n % 1 !== 0
+export function isNumeric(val: number) {
+	return Number(parseFloat(val)) === val
+}
 
 export function debounce<ArgType: any>(
 	timeout: number,
diff --git a/test/mecanisms.test.js b/test/mecanisms.test.js
index ed82766b3..1433d56b7 100644
--- a/test/mecanisms.test.js
+++ b/test/mecanisms.test.js
@@ -10,7 +10,7 @@ import { analyse, parseAll } from '../source/engine/traverse'
 import { collectMissingVariables } from '../source/engine/generateQuestions'
 import testSuites from './load-mecanism-tests'
 import * as R from 'ramda'
-import { isFloat } from '../source/utils'
+import { isNumeric } from '../source/utils'
 
 describe('Mécanismes', () =>
 	testSuites.map(suite =>
@@ -45,8 +45,7 @@ describe('Mécanismes', () =>
 										missing = collectMissingVariables(analysis.targets),
 										target = analysis.targets[0]
 
-									// console.log('JSON.stringify(analysis', JSON.stringify(analysis))
-									if (isFloat(valeur)) {
+									if (isNumeric(valeur)) {
 										expect(target.nodeValue).to.be.closeTo(valeur, 0.001)
 									} else if (valeur !== undefined) {
 										expect(target).to.have.property('nodeValue', valeur)