diff --git a/.gitattributes b/.gitattributes
index 5905a311001..214b64ac9b4 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1,6 @@
 **/package-lock.json linguist-generated=true -diff
+# Disable linguist for WebAssembly files.
+# Those are used to test the runtime and should not be indexed.
+*.wasm linguist-detectable=false
+*.wast linguist-detectable=false
+*.wat linguist-detectable=false