Index: tests/contains.test
===================================================================
diff -u -re48161ab167236344f7d23da3e855c31d1a1ebc7 -r982b1e8d84f71b36961ba034754f2e35e1ddb869
--- tests/contains.test	(.../contains.test)	(revision e48161ab167236344f7d23da3e855c31d1a1ebc7)
+++ tests/contains.test	(.../contains.test)	(revision 982b1e8d84f71b36961ba034754f2e35e1ddb869)
@@ -2,8 +2,7 @@
 package prefer latest
 package require nx
 
-set ::tcl86 [package vsatisfies [package req Tcl] 8.6]
-set ::tcl90 [package vsatisfies [package req Tcl] 9.0]
+set ::tcl86 [package vsatisfies [package req Tcl] 8.6-]
 
 #
 # Intentionally, we do not want to make a "namespace import" in this
@@ -184,7 +183,7 @@
 set ::errorcode $::errorCode
 ? {set ::errorMsg} {somethingwrong}
 
-if {$::tcl86 || $::tcl90} {
+if {$::tcl86} {
   set r {somethingwrong
     while executing
 "o contains { return -code error -errorcode {FOO bar baz} somethingwrong}"} 
Index: tests/destroy.test
===================================================================
diff -u -r8024df76962dab57646dc206e07a7ae66e7990ad -r982b1e8d84f71b36961ba034754f2e35e1ddb869
--- tests/destroy.test	(.../destroy.test)	(revision 8024df76962dab57646dc206e07a7ae66e7990ad)
+++ tests/destroy.test	(.../destroy.test)	(revision 982b1e8d84f71b36961ba034754f2e35e1ddb869)
@@ -2,7 +2,7 @@
 package require nx
 package require nx::test
 
-set ::tcl86 [package vsatisfies [package req Tcl] 8.6]
+set ::tcl86 [package vsatisfies [package req Tcl] 8.6-]
 
 nx::test configure -count 10
 
Index: tests/forward.test
===================================================================
diff -u -r8e2e356e9bcef39f43dfe3690b82d9586c7adc72 -r982b1e8d84f71b36961ba034754f2e35e1ddb869
--- tests/forward.test	(.../forward.test)	(revision 8e2e356e9bcef39f43dfe3690b82d9586c7adc72)
+++ tests/forward.test	(.../forward.test)	(revision 982b1e8d84f71b36961ba034754f2e35e1ddb869)
@@ -5,7 +5,7 @@
 package require nx
 package require nx::test
 
-set ::tcl86 [package vsatisfies [package req Tcl] 8.6]
+set ::tcl86 [package vsatisfies [package req Tcl] 8.6-]
 
 ###########################################
 # trivial object delegation
Index: tests/nsf-cmd.test
===================================================================
diff -u -r5bcb005ea31a89167ea237f47dffb0c0166bd2c9 -r982b1e8d84f71b36961ba034754f2e35e1ddb869
--- tests/nsf-cmd.test	(.../nsf-cmd.test)	(revision 5bcb005ea31a89167ea237f47dffb0c0166bd2c9)
+++ tests/nsf-cmd.test	(.../nsf-cmd.test)	(revision 982b1e8d84f71b36961ba034754f2e35e1ddb869)
@@ -2,7 +2,7 @@
 
 package require nx::test
 
-set ::tcl86 [package vsatisfies [package req Tcl] 8.6]
+set ::tcl86 [package vsatisfies [package req Tcl] 8.6-]
 
 nx::test case nsf-method-get-variants {
 
Index: tests/tcl86.test
===================================================================
diff -u -r9e281d5110f397a9e9b8317325d0675f1793246d -r982b1e8d84f71b36961ba034754f2e35e1ddb869
--- tests/tcl86.test	(.../tcl86.test)	(revision 9e281d5110f397a9e9b8317325d0675f1793246d)
+++ tests/tcl86.test	(.../tcl86.test)	(revision 982b1e8d84f71b36961ba034754f2e35e1ddb869)
@@ -259,7 +259,7 @@
 #
 if {![package vsatisfies [package req Tcl] 8.6.7]} {return}
 
-set tcl87 [package vsatisfies [package req Tcl] 8.7]
+set tcl87 [package vsatisfies [package req Tcl] 8.7-]
 
 nx::test case bug-3418547 {
   #