diff --git a/bin/build-lib.js b/bin/build-lib.js
index c2e8fd2a82..cd39ee0872 100644
--- a/bin/build-lib.js
+++ b/bin/build-lib.js
@@ -115,22 +115,6 @@ async function buildLib () {
             transformJSXImportsToJS(path)
           }
         },
-
-        /**
-         * Removes all `[Symbol.for('uppy test: …')]` methods when building.
-         *
-         * @param {{ node: t.ClassMethod }} path
-         */
-        // eslint-disable-next-line no-shadow
-        ClassMethod (path) {
-          const { key, computed } = path.node
-          if (computed && key.type === 'CallExpression' && key.callee.type === 'MemberExpression' && key.callee.object.name === 'Symbol' && key.callee.property.name === 'for' && key.arguments.length === 1) {
-            const { arguments: [{ type, value }] } = path.node.key
-            if (type === 'Literal' && value.startsWith('uppy test: ')) {
-              path.remove()
-            }
-          }
-        },
       },
     }] : undefined
     const { code, map } = await babel.transformFileAsync(file, { sourceMaps: true, plugins })