diff --git a/collects/tests/drscheme/repl-test.ss b/collects/tests/drscheme/repl-test.ss
index f08844e992..906f7a598e 100644
--- a/collects/tests/drscheme/repl-test.ss
+++ b/collects/tests/drscheme/repl-test.ss
@@ -192,8 +192,8 @@ This produces an ACK message
             "{stop-multi.png} {stop-22x22.png} reference to undefined identifier: xx"
             "{stop-multi.png} {stop-22x22.png} repl-test-tmp3.ss:1:0: reference to undefined identifier: xx"
             "reference to undefined identifier: xx"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: xx"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: xx")
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: xx"
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: xx")
            'definitions
            #f
            void
@@ -268,8 +268,8 @@ This produces an ACK message
             "define-values: cannot change constant identifier: +"
             "define-values: cannot change constant identifier: +"
             "define-values: cannot change constant identifier: +"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:246:28: define-values: cannot change constant identifier: +"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:246:28: define-values: cannot change constant identifier: +")
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:246:28: define-values: cannot change constant identifier: \\+"
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:246:28: define-values: cannot change constant identifier: \\+")
            'interactions
            #f
            void
@@ -307,8 +307,8 @@ This produces an ACK message
             "{stop-multi.png} {stop-22x22.png} reference to undefined identifier: xx"
             "{stop-multi.png} {stop-22x22.png} repl-test-tmp3.ss:1:7: reference to undefined identifier: xx"
             "reference to undefined identifier: xx"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: xx"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: xx")
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: xx"
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: xx")
            'definitions
            #f
            void
@@ -352,8 +352,8 @@ This produces an ACK message
             "{stop-multi.png} {stop-22x22.png} reference to undefined identifier: xx"
             "{stop-multi.png} {stop-22x22.png} repl-test-tmp3.ss:2:0: reference to undefined identifier: xx"
             "reference to undefined identifier: xx"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: xx"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: xx")
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: xx"
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: xx")
            'definitions
            #f
            void
@@ -419,8 +419,8 @@ This produces an ACK message
             "{stop-multi.png} {stop-22x22.png} reference to undefined identifier: x"
             "{stop-multi.png} {stop-22x22.png} repl-test-tmp3.ss:1:4: reference to undefined identifier: x"
             "reference to undefined identifier: x"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: x"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: x")
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: x"
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: x")
            'definitions
            #f
            void
@@ -459,8 +459,8 @@ This produces an ACK message
             "{stop-multi.png} {stop-22x22.png} expt: expected argument of type <number>; given #<void>"
             "{stop-multi.png} {stop-22x22.png} repl-test-tmp3.ss:1:0: expt: expected argument of type <number>; given #<void>"
             "expt: expected argument of type <number>; given #<void>"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: expt: expected argument of type <number>; given #<void>"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: expt: expected argument of type <number>; given #<void>")
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: expt: expected argument of type <number>; given #<void>"
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: expt: expected argument of type <number>; given #<void>")
            'definitions
            #f
            void
@@ -509,8 +509,8 @@ This produces an ACK message
             "{stop-multi.png} {stop-22x22.png} reference to undefined identifier: x"
             "{stop-multi.png} {stop-22x22.png} repl-test-tmp3.ss:1:4: reference to undefined identifier: x"
             "1\n2\nreference to undefined identifier: x"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: x"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: x")
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: x"
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: x")
            'definitions
            #f
            void
@@ -622,8 +622,8 @@ This produces an ACK message
      "{stop-multi.png} {stop-22x22.png} expt: expected argument of type <number>; given #f\n15"
      "{stop-multi.png} {stop-22x22.png} repl-test-tmp3.ss:5:19: expt: expected argument of type <number>; given #f\n15"
      "expt: expected argument of type <number>; given #f\n15"
-     "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: expt: expected argument of type <number>; given #f\n15"
-     "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: expt: expected argument of type <number>; given #f\n15")
+     #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: expt: expected argument of type <number>; given #f\n15"
+     #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: expt: expected argument of type <number>; given #f\n15")
     'definitions
     #f
     void
@@ -727,8 +727,8 @@ This produces an ACK message
      "{stop-multi.png} {stop-22x22.png} expt: expected argument of type <number>; given #f"
      "{stop-multi.png} {stop-22x22.png} repl-test-tmp3.ss:6:15: expt: expected argument of type <number>; given #f"
      "expt: expected argument of type <number>; given #f"
-     "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: expt: expected argument of type <number>; given #f"
-     "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: expt: expected argument of type <number>; given #f")
+     #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: expt: expected argument of type <number>; given #f"
+     #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: expt: expected argument of type <number>; given #f")
     'definitions
     #f
     void
@@ -804,8 +804,8 @@ This produces an ACK message
             "{stop-multi.png} {stop-22x22.png} procedure application: expected procedure, given: 3; arguments were: 3"
             "{stop-multi.png} {stop-22x22.png} repl-test-tmp3.ss:3:13: procedure application: expected procedure, given: 3; arguments were: 3"
             "procedure application: expected procedure, given: 3; arguments were: 3"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:246:28: procedure application: expected procedure, given: 3; arguments were: 3"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:246:28: procedure application: expected procedure, given: 3; arguments were: 3")
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:246:28: procedure application: expected procedure, given: 3; arguments were: 3"
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:246:28: procedure application: expected procedure, given: 3; arguments were: 3")
            'definitions
            #f
            void
@@ -894,8 +894,8 @@ This produces an ACK message
             "{stop-multi.png} {stop-22x22.png} reference to undefined identifier: xx"
             "{stop-multi.png} {stop-22x22.png} repl-test-tmp3.ss:1:0: reference to undefined identifier: xx"
             "reference to undefined identifier: xx"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: xx"
-            "{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:230:18: reference to undefined identifier: xx")
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: xx"
+            #rx"{stop-multi.png} {stop-22x22.png} ../../mred/private/snipfile.ss:[0-9]+:[0-9]+: reference to undefined identifier: xx")
            'definitions
            #f
            void