diff --git a/extra/sequences/inserters/inserters-tests.factor b/extra/sequences/inserters/inserters-tests.factor
index b1f8691a8d..3b6220bd18 100644
--- a/extra/sequences/inserters/inserters-tests.factor
+++ b/extra/sequences/inserters/inserters-tests.factor
@@ -1,25 +1,26 @@
 ! (c)2010 Joe Groff bsd license
-USING: sequences.inserters tools.test ;
+USING: assocs kernel sequences sequences.inserters tools.test
+unicode.case ;
 IN: sequences.inserters.tests
 
 [ V{ 1 2 "Three" "Four" "Five" } ] [
     { "three" "four" "five" }
-    [ >title ] V{ 1 2 } clone <back-inserter> map-as
+    [ >title ] V{ 1 2 } clone <appender> map-as
 ] unit-test
 
 [ t ] [
     { "three" "four" "five" }
-    [ >title ] V{ 1 2 } clone [ <back-inserter> map-as ] keep eq?
+    [ >title ] V{ 1 2 } clone [ <appender> map-as ] keep eq?
 ] unit-test
 
 [ V{ 1 2 "Three" "Four" "Five" } ] [
     { { "Th" "ree" } { "Fo" "ur" } { "Fi" "ve" } }
-    [ append ] V{ 1 2 } clone <back-inserter> assoc>map
+    [ append ] V{ 1 2 } clone <appender> assoc>map
 ] unit-test
 
 [ t ] [
     { { "Th" "ree" } { "Fo" "ur" } { "Fi" "ve" } }
-    [ append ] V{ 1 2 } clone [ <back-inserter> assoc>map ] keep eq?
+    [ append ] V{ 1 2 } clone [ <appender> assoc>map ] keep eq?
 ] unit-test
 
 [ V{ "Three" "Four" "Five" } ] [
@@ -31,3 +32,14 @@ IN: sequences.inserters.tests
     { "three" "four" "five" }
     [ >title ] V{ 1 2 } clone [ <replacer> map-as ] keep eq?
 ] unit-test
+
+[ V{ "Three" "Four" "Five" } ] [
+    { { "Th" "ree" } { "Fo" "ur" } { "Fi" "ve" } }
+    [ append ] V{ 1 2 } clone <replacer> assoc>map
+] unit-test
+
+[ t ] [
+    { { "Th" "ree" } { "Fo" "ur" } { "Fi" "ve" } }
+    [ append ] V{ 1 2 } clone [ <replacer> assoc>map ] keep eq?
+] unit-test
+
diff --git a/extra/sequences/inserters/inserters.factor b/extra/sequences/inserters/inserters.factor
index 08b9b8911d..e0075f158c 100644
--- a/extra/sequences/inserters/inserters.factor
+++ b/extra/sequences/inserters/inserters.factor
@@ -22,12 +22,12 @@ M: inserter new-resizable
 M: inserter length
     drop 0 ; inline
 
-TUPLE: back-inserter { underlying read-only } ;
-C: <back-inserter> back-inserter
+TUPLE: appender { underlying read-only } ;
+C: <appender> appender
 
-INSTANCE: back-inserter inserter
+INSTANCE: appender inserter
 
-M:: back-inserter new-sequence ( len inserter -- sequence )
+M:: appender new-sequence ( len inserter -- sequence )
     inserter underlying>> :> underlying
     underlying length :> old-length
     old-length len + :> new-length