Index: tests/methods.test
===================================================================
diff -u -N -r42350dcac26a773a14673da7ece98810ba3fd052 -re5a313d7150ca82b5e8ac1b0953ee90d18cb4dd2
--- tests/methods.test	(.../methods.test)	(revision 42350dcac26a773a14673da7ece98810ba3fd052)
+++ tests/methods.test	(.../methods.test)	(revision e5a313d7150ca82b5e8ac1b0953ee90d18cb4dd2)
@@ -769,7 +769,7 @@
   ? {o1 info children} "::o1::info ::o1::per-object-slot"
 
   ? {o1 delete object method bar} "::o1: object specific method 'bar' does not exist"
-  # For a1, we have a method and an property. We can delete the
+  # For a1, we have a method and a property. We can delete the
   # method without the slot.
   ? {o1 delete object method a1} ""
   # After the deletion of the accessor, the slot exists still
Index: tests/parameters.test
===================================================================
diff -u -N -r0a73b191ba9a006e392621e3de7ca1301a13c269 -re5a313d7150ca82b5e8ac1b0953ee90d18cb4dd2
--- tests/parameters.test	(.../parameters.test)	(revision 0a73b191ba9a006e392621e3de7ca1301a13c269)
+++ tests/parameters.test	(.../parameters.test)	(revision e5a313d7150ca82b5e8ac1b0953ee90d18cb4dd2)
@@ -2402,7 +2402,7 @@
 # Strengths of object-level parameters:
 # - same interface as class-level attributes
 # - can use same meta-data mechanisms as for class-level attributes
-#   (e.g database types, property name in the database, persistence
+#   (e.g. database types, property name in the database, persistence
 #   information, ...)
   # - can use same setters/checkers as for class-level attributes
 # - can use as well incremental as for class-level attributes
@@ -2663,7 +2663,7 @@
 
 nx::test case object-parameter-switch {
 
-  # Create a class with an property of type switch and an instance of
+  # Create a class with a property of type switch and an instance of
   # the class
   ? {::nx::Class create C {
     :property -accessor public foo:switch
@@ -2854,7 +2854,7 @@
 # The following test case sets a value of an instance variable via a
 # side-effect of an aliased parameter. Side-effects from aliased
 # parameters are discouraged, since the order of the evaluation should
-# not matter of an declarative evaluation of the argument vector.
+# not matter of a declarative evaluation of the argument vector.
 #
 # Note that the order, in which is the arguments are provided is not
 # significant for the evaluation order.
Index: tests/serialize.test
===================================================================
diff -u -N -rf9f501ffe3b3bd7a3843416f82fc6189be2634ff -re5a313d7150ca82b5e8ac1b0953ee90d18cb4dd2
--- tests/serialize.test	(.../serialize.test)	(revision f9f501ffe3b3bd7a3843416f82fc6189be2634ff)
+++ tests/serialize.test	(.../serialize.test)	(revision e5a313d7150ca82b5e8ac1b0953ee90d18cb4dd2)
@@ -22,7 +22,7 @@
 
   #puts [xxx serialize -target XXX]
   #
-  # Create an serialized object, which has the target mapped to
+  # Create a serialized object, which has the target mapped to
   # XXX. The target name has intentionally no leading colons, such
   # that the object can be instantiated in a different namespace. This
   # is for example useful when importing objects in OpenACS from a
Index: tests/var-access.test
===================================================================
diff -u -N -r4bc60e16c10fdbbb640b3019d4bdebdc469fdf55 -re5a313d7150ca82b5e8ac1b0953ee90d18cb4dd2
--- tests/var-access.test	(.../var-access.test)	(revision 4bc60e16c10fdbbb640b3019d4bdebdc469fdf55)
+++ tests/var-access.test	(.../var-access.test)	(revision e5a313d7150ca82b5e8ac1b0953ee90d18cb4dd2)
@@ -56,7 +56,7 @@
   ? {nsf::var::exists o1 x} 0
   ? {nsf::var::exists -array o1 x} 0
 
-  # unset on an non-existing variable
+  # unset on a non-existing variable
   ? {nsf::var::unset o1 x} {can't unset "x": no such variable}
   ? {nsf::var::unset -nocomplain o1 x} ""
 }
Index: tests/varresolution.test
===================================================================
diff -u -N -r357028ca6e4ffd7ec4ed240e75c9c001f9c4a8cc -re5a313d7150ca82b5e8ac1b0953ee90d18cb4dd2
--- tests/varresolution.test	(.../varresolution.test)	(revision 357028ca6e4ffd7ec4ed240e75c9c001f9c4a8cc)
+++ tests/varresolution.test	(.../varresolution.test)	(revision e5a313d7150ca82b5e8ac1b0953ee90d18cb4dd2)
@@ -45,7 +45,7 @@
 nx::Object create o
 nx::Object create o2 {set :i 1}
 o objeval {
-  # require an namespace within an objscoped frame; it is necessary to replace
+  # require a namespace within an objscoped frame; it is necessary to replace
   # vartables on the stack
   :require namespace
   global g
@@ -826,14 +826,14 @@
       set type 1
       # 2. at compile time: create a proc-local, compiled link-var ":type"
       info exists :type
-      # 3. at (unoptimised) interpretation time: bypasses compiled link-var
+      # 3. at (unoptimized) interpretation time: bypasses compiled link-var
       # ":type" (invokeStr instruction; a simple eval), does a var
       # lookup with ":type", handled by InterpColonVarResolver();
       # CompiledLocalsLookup() receives the var name (i.e., ":type")
       # and finds the proc-local compiled var ":type" (actually a link
       # variable to the actual/real object variable).
       eval {info exists :type};
-      # Note! A [info exists :type] would have been optimised on the
+      # Note! A [info exists :type] would have been optimized on the
       # bytecode fastpath (i.e., existsScalar instruction) and would
       # use the compiled-local link-var ":type" directly (without
       # visiting InterpColonVarResolver()!)