diff --git a/testing/web-platform/tests/fetch/local-network-access/mixed-content-fetch.tentative.https.window.js b/testing/web-platform/tests/fetch/local-network-access/mixed-content-fetch.tentative.https.window.js
index 98e8f07c02a9e..58f5201e5d2f9 100644
--- a/testing/web-platform/tests/fetch/local-network-access/mixed-content-fetch.tentative.https.window.js
+++ b/testing/web-platform/tests/fetch/local-network-access/mixed-content-fetch.tentative.https.window.js
@@ -39,7 +39,7 @@ github
 .
 io
 /
-local
+private
 -
 network
 -
@@ -64,7 +64,7 @@ subresources
 /
 from
 more
-local
+private
 address
 spaces
 avoiding
@@ -151,7 +151,7 @@ addressSpace
 {
 case
 "
-loopback
+local
 "
 :
 return
@@ -160,7 +160,7 @@ return
 unknown
 "
 "
-local
+private
 "
 "
 public
@@ -169,7 +169,7 @@ public
 ;
 case
 "
-local
+private
 "
 :
 return
@@ -178,7 +178,7 @@ return
 unknown
 "
 "
-loopback
+local
 "
 "
 public
@@ -196,10 +196,10 @@ return
 unknown
 "
 "
-loopback
+local
 "
 "
-local
+private
 "
 ]
 ;
@@ -955,7 +955,7 @@ prefix
 '
 not
 a
-local
+private
 network
 request
 .
@@ -967,7 +967,7 @@ request
 /
 Source
 :
-loopback
+local
 secure
 context
 .
@@ -978,9 +978,9 @@ context
 Fetches
 to
 the
-loopback
-and
 local
+and
+private
 address
 spaces
 cannot
@@ -1001,7 +1001,7 @@ otherwise
 /
 blocked
 by
-Local
+Private
 Network
 Access
 .
@@ -1011,12 +1011,12 @@ makeNoBypassTests
 source
 :
 "
-loopback
+local
 "
 target
 :
 "
-loopback
+local
 "
 }
 )
@@ -1027,12 +1027,12 @@ makeNoBypassTests
 source
 :
 "
-loopback
+local
 "
 target
 :
 "
-local
+private
 "
 }
 )
@@ -1043,7 +1043,7 @@ makeNoBypassTests
 source
 :
 "
-loopback
+local
 "
 target
 :
@@ -1057,7 +1057,7 @@ public
 /
 Source
 :
-local
+private
 secure
 context
 .
@@ -1068,7 +1068,7 @@ context
 Fetches
 to
 the
-loopback
+local
 address
 space
 requires
@@ -1101,7 +1101,7 @@ header
 Fetches
 to
 the
-local
+private
 address
 space
 cannot
@@ -1120,7 +1120,7 @@ not
 otherwise
 blocked
 by
-Local
+Private
 Network
 /
 /
@@ -1132,12 +1132,12 @@ makeTests
 source
 :
 "
-local
+private
 "
 target
 :
 "
-loopback
+local
 "
 }
 )
@@ -1148,12 +1148,12 @@ makeNoBypassTests
 source
 :
 "
-local
+private
 "
 target
 :
 "
-local
+private
 "
 }
 )
@@ -1164,7 +1164,7 @@ makeNoBypassTests
 source
 :
 "
-local
+private
 "
 target
 :
@@ -1189,9 +1189,9 @@ context
 Fetches
 to
 the
-loopback
-and
 local
+and
+private
 address
 spaces
 require
@@ -1228,7 +1228,7 @@ public
 target
 :
 "
-loopback
+local
 "
 }
 )
@@ -1244,7 +1244,7 @@ public
 target
 :
 "
-local
+private
 "
 }
 )
@@ -1275,12 +1275,12 @@ documents
 fetched
 from
 the
-loopback
+local
 address
 space
+yet
 /
 /
-yet
 carrying
 the
 treat
@@ -1296,9 +1296,9 @@ are
 treated
 as
 if
+they
 /
 /
-they
 had
 been
 fetched
@@ -1364,9 +1364,9 @@ fetchOptions
 {
 targetAddressSpace
 :
-'
-local
-'
+"
+private
+"
 }
 expected
 :
@@ -1386,12 +1386,12 @@ public
 to
 http
 -
-loopback
+local
 :
 wrong
 targetAddressSpace
 "
-local
+private
 "
 .
 '
@@ -1454,7 +1454,7 @@ fetchOptions
 targetAddressSpace
 :
 "
-loopback
+local
 "
 }
 expected
@@ -1475,7 +1475,7 @@ public
 to
 http
 -
-loopback
+local
 :
 success
 .
@@ -1539,7 +1539,7 @@ fetchOptions
 targetAddressSpace
 :
 "
-loopback
+local
 "
 }
 expected
@@ -1560,12 +1560,12 @@ public
 to
 http
 -
-local
+private
 :
 wrong
 targetAddressSpace
 "
-loopback
+local
 "
 .
 '
@@ -1628,7 +1628,7 @@ fetchOptions
 targetAddressSpace
 :
 "
-local
+private
 "
 }
 expected
@@ -1649,7 +1649,7 @@ public
 to
 http
 -
-local
+private
 :
 success
 .
diff --git a/testing/web-platform/tests/fetch/local-network-access/resources/support.sub.js b/testing/web-platform/tests/fetch/local-network-access/resources/support.sub.js
index c1e726cec7d5f..2b5d542d3e6d2 100644
--- a/testing/web-platform/tests/fetch/local-network-access/resources/support.sub.js
+++ b/testing/web-platform/tests/fetch/local-network-access/resources/support.sub.js
@@ -581,7 +581,7 @@ http
 :
 {
 "
-loopback
+local
 "
 :
 {
@@ -596,7 +596,7 @@ http
 }
 }
 "
-local
+private
 "
 :
 {
@@ -636,7 +636,7 @@ https
 :
 {
 "
-loopback
+local
 "
 :
 {
@@ -653,7 +653,7 @@ https
 "
 other
 -
-loopback
+local
 "
 :
 {
@@ -668,7 +668,7 @@ https
 }
 }
 "
-local
+private
 "
 :
 {
@@ -708,7 +708,7 @@ ws
 :
 {
 "
-loopback
+local
 "
 :
 {
@@ -729,7 +729,7 @@ wss
 :
 {
 "
-loopback
+local
 "
 :
 {
@@ -974,7 +974,7 @@ get
 http
 "
 "
-loopback
+local
 "
 )
 ;
@@ -989,7 +989,7 @@ get
 http
 "
 "
-local
+private
 "
 )
 ;
@@ -1019,7 +1019,7 @@ get
 https
 "
 "
-loopback
+local
 "
 )
 ;
@@ -1036,7 +1036,7 @@ https
 "
 other
 -
-loopback
+local
 "
 )
 ;
@@ -1051,7 +1051,7 @@ get
 https
 "
 "
-local
+private
 "
 )
 ;
@@ -1081,7 +1081,7 @@ get
 ws
 "
 "
-loopback
+local
 "
 )
 ;
@@ -1096,7 +1096,7 @@ get
 wss
 "
 "
-loopback
+local
 "
 )
 ;