diff --git a/fetch/api/basic/WEB_FEATURES.yml b/fetch/api/basic/WEB_FEATURES.yml
index 01cfa8b696c8a3..1bac11c5b5c607 100644
--- a/fetch/api/basic/WEB_FEATURES.yml
+++ b/fetch/api/basic/WEB_FEATURES.yml
@@ -10,3 +10,8 @@ features:
   files:
   # Note: Test coverage for this feature is very incomplete
   - http-response-code.any.js
+# The following classifier for "http2" intentionally overlaps with the above
+# classifier for "fetch" because "statusText" is a Fetch API concept.
+- name: http2
+  files:
+  - status.h2.any.js
diff --git a/fetch/api/credentials/WEB_FEATURES.yml b/fetch/api/credentials/WEB_FEATURES.yml
index 399d8c1669be60..9d1d71eeaed6bf 100644
--- a/fetch/api/credentials/WEB_FEATURES.yml
+++ b/fetch/api/credentials/WEB_FEATURES.yml
@@ -1,3 +1,10 @@
 features:
+# The classifier for "http-authentication" intentionally overlaps with the
+# below classifier for "fetch" because the boundary between the two features is
+# somewhat subjective.
+- name: http-authentication
+  files:
+  - authentication-basic.any.js
+  - authentication-redirection.any.js
 - name: fetch
   files: "**"
diff --git a/fetch/http-cache/WEB_FEATURES.yml b/fetch/http-cache/WEB_FEATURES.yml
index 399d8c1669be60..b68153ddba34f3 100644
--- a/fetch/http-cache/WEB_FEATURES.yml
+++ b/fetch/http-cache/WEB_FEATURES.yml
@@ -1,3 +1,9 @@
 features:
+# The classifier for "http-authentication" intentionally overlaps with the
+# below classifier for "fetch" because the boundary between the two features is
+# somewhat subjective.
+- name: http-authentication
+  files:
+  - basic-auth-cache-test.html
 - name: fetch
   files: "**"
diff --git a/xhr/WEB_FEATURES.yml b/xhr/WEB_FEATURES.yml
index 3144c72a515eb6..eb73be520a0f92 100644
--- a/xhr/WEB_FEATURES.yml
+++ b/xhr/WEB_FEATURES.yml
@@ -4,3 +4,24 @@ features:
 - name: base
   files:
   - open-url-base.htm
+# The classifier for "http-authentication" intentionally overlaps with the
+# above classifier for "xhr" because the boundary between the two features is
+# somewhat subjective.
+- name: http-authentication
+  files:
+  - send-authentication-basic-cors-not-enabled.htm
+  - send-authentication-basic-repeat-no-args.htm
+  - send-authentication-basic-setrequestheader-and-arguments.htm
+  - send-authentication-basic-setrequestheader-existing-session.htm
+  - send-authentication-basic-setrequestheader.htm
+  - send-authentication-basic.htm
+  - send-authentication-competing-names-passwords.htm
+  - send-authentication-existing-session-manual.htm
+  - send-authentication-prompt-2-manual.htm
+  - send-authentication-prompt-manual.htm
+# The classifier for "httpt2" intentionally overlaps with the above classifier
+# for "xhr" because the boundary between the two features is somewhat
+# subjective.
+- name: http2
+  files:
+  - status.h2.window.js