8 files changed, 64 insertions, 42 deletions
diff --git a/tests/test/common.test b/tests/test/common.test
index 0f63bd3..7e3aa67 100644
--- a/tests/test/common.test
+++ b/tests/test/common.test
@@ -7,7 +7,7 @@
 #
 
 +mkdir build
-+cat <<EOI >>>build/bootstrap.build
++cat <<EOI >=build/bootstrap.build
 project = test
 amalgamation =
 
diff --git a/tests/test/config-test/testscript b/tests/test/config-test/testscript
index be342ef..0851da7 100644
--- a/tests/test/config-test/testscript
+++ b/tests/test/config-test/testscript
@@ -12,14 +12,14 @@ test.cleanups  = &!./ #@@ TMP
 
 +mkdir proj
 +mkdir proj/build
-+cat <<EOI >>>proj/build/bootstrap.build
++cat <<EOI >=proj/build/bootstrap.build
 project = proj
 amalgamation =
 
 using test
 EOI
 
-+cat <<EOI >>>proj/buildfile
++cat <<EOI >=proj/buildfile
 d = tests/ units/
 ./: $d
 include $d
@@ -29,13 +29,13 @@ EOI
 #
 +mkdir proj/tests
 +mkdir proj/tests/build
-+cat <<EOI >>>proj/tests/build/bootstrap.build
++cat <<EOI >=proj/tests/build/bootstrap.build
 project =
 
 using test
 EOI
 
-+cat <<EOI >>>proj/tests/buildfile
++cat <<EOI >=proj/tests/buildfile
 d = script/
 ./: $d
 include $d
@@ -44,17 +44,17 @@ EOI
 # tests/script - scripted test
 #
 +mkdir proj/tests/script
-+cat <<EOI >>>proj/tests/script/buildfile
++cat <<EOI >=proj/tests/script/buildfile
 ./: test{basics.test}
 EOI
-+cat <<EOI >>>proj/tests/script/basics.test
-echo 'tests/script/basics/foo' >+ : foo
-echo 'tests/script/basics/bar' >+ : bar
++cat <<EOI >=proj/tests/script/basics.test
+echo 'tests/script/basics/foo' >| : foo
+echo 'tests/script/basics/bar' >| : bar
 
 : baz
 {
-  echo 'tests/script/basics/baz/foo' >+ : foo
-  echo 'tests/script/basics/baz/bar' >+ : bar
+  echo 'tests/script/basics/baz/foo' >| : foo
+  echo 'tests/script/basics/baz/bar' >| : bar
 }
 EOI
 
@@ -64,13 +64,13 @@ EOI
 
 # This one is "dual": test and sub-test alias.
 #
-+cat <<EOI >>>proj/units/buildfile
++cat <<EOI >=proj/units/buildfile
 d = simple/ script/
 ./: $d test{testscript}
 include $d
 EOI
-+cat <<EOI >>>proj/units/testscript
-echo 'units' >+
++cat <<EOI >=proj/units/testscript
+echo 'units' >|
 EOI
 
 # units/simple - simple (non-scripted) test
@@ -81,7 +81,7 @@ EOI
 #
 +mkdir proj/units/simple
 +touch proj/units/simple/driver
-+cat <<EOI >>>proj/units/simple/buildfile
++cat <<EOI >=proj/units/simple/buildfile
 driver = $src_root/../../exe{driver}
 #@@ TMP file{driver}@./: $driver
 ./: file{driver} $driver
@@ -92,12 +92,12 @@ EOI
 # units/script - scripted test
 #
 +mkdir proj/units/script
-+cat <<EOI >>>proj/units/script/buildfile
++cat <<EOI >=proj/units/script/buildfile
 ./: test{testscript}
 EOI
-+cat <<EOI >>>proj/units/script/testscript
-echo 'units/script/foo' >+ : foo
-echo 'units/script/bar' >+ : bar
++cat <<EOI >=proj/units/script/testscript
+echo 'units/script/foo' >| : foo
+echo 'units/script/bar' >| : bar
 EOI
 
 # Now the tests. Should all be top-level, no groups (or set test.arguments).
diff --git a/tests/test/script-integration/testscript b/tests/test/script-integration/testscript
index f102f5b..faade22 100644
--- a/tests/test/script-integration/testscript
+++ b/tests/test/script-integration/testscript
@@ -74,7 +74,7 @@ EOE
 : scope. Also note that we still have to remove everything after detecting the
 : failure.
 :
-cat <<EOI >>>foo.test;
+cat <<EOI >=foo.test;
 touch ../../dummy
 EOI
 $* <<EOI 2>>/EOE &test/*** != 0
diff --git a/tests/test/script/builtin/cat.test b/tests/test/script/builtin/cat.test
index f5041fc..442ef00 100644
--- a/tests/test/script/builtin/cat.test
+++ b/tests/test/script/builtin/cat.test
@@ -33,7 +33,7 @@ $b
 : file
 :
 $c <<EOI;
-cat <<EOF >>>out;
+cat <<EOF >=out;
 foo
 bar
 EOF
diff --git a/tests/test/script/builtin/touch.test b/tests/test/script/builtin/touch.test
index a80a05c..b3a043e 100644
--- a/tests/test/script/builtin/touch.test
+++ b/tests/test/script/builtin/touch.test
@@ -24,7 +24,7 @@ $b
 : Test that existing file touch doesn't fail.
 :
 $c <<EOI;
-cat <"" >>>a;
+cat <"" >=a;
 touch a
 EOI
 $b
diff --git a/tests/test/script/common.test b/tests/test/script/common.test
index 177fa75..781be30 100644
--- a/tests/test/script/common.test
+++ b/tests/test/script/common.test
@@ -7,7 +7,7 @@
 #
 
 +mkdir build
-+cat <<"EOI" >>>build/bootstrap.build
++cat <<"EOI" >=build/bootstrap.build
 project = test
 amalgamation =
 
@@ -18,7 +18,7 @@ EOI
 # levels up from our working directory.
 #
 +if! $empty($target)
-  cat <<"EOI" >>>build/root.build
+  cat <<"EOI" >=build/root.build
   target = \$src_root/../../$string([name] $target)
   test{*}: test = \$target
   EOI
@@ -31,6 +31,6 @@ end
 # Note that the buildfile is clever hack that relies on the first target
 # automatically becoming dir{./}'s prerequisite.
 #
-c = cat >>>testscript
+c = cat >=testscript
 b = $0 --jobs 1 --quiet --buildfile - test <"'test{testscript}: \$target'" \
 &?test/***
diff --git a/tests/test/script/runner/cleanup.test b/tests/test/script/runner/cleanup.test
index ed724ee..1c3ccae 100644
--- a/tests/test/script/runner/cleanup.test
+++ b/tests/test/script/runner/cleanup.test
@@ -46,7 +46,7 @@ b += --no-column
   :
   $c <<EOI;
   touch a &!a;
-  $* -o foo >>>&a;
+  $* -o foo >+a;
   rm a
   EOI
   $b
@@ -224,7 +224,7 @@ $b
 :
 : Test an implicit cleanup being overwritten with the explicit one,
 :
-$c <'$* -o foo >>>a &!a';
+$c <'$* -o foo >=a &!a';
 $b 2>>/EOE != 0
 testscript:1: error: registered for cleanup directory test/1/ is not empty
 EOE
@@ -235,7 +235,7 @@ EOE
 :
 $c <<EOO;
 $* &!a;
-$* -o foo >>>a
+$* -o foo >=a
 EOO
 $b 2>>/EOE != 0
 testscript:2: error: registered for cleanup directory test/1/ is not empty
diff --git a/tests/test/script/runner/redirect.test b/tests/test/script/runner/redirect.test
index e2d765c..f32492a 100644
--- a/tests/test/script/runner/redirect.test
+++ b/tests/test/script/runner/redirect.test
@@ -465,31 +465,53 @@ psr = ($cxx.target.class != 'windows' ? '/' : '\\') # Path separator in regex.
 : file
 :
 {
-  : in-out
+  : in
   :
   $c <<EOI;
-  $* -o foo >>>out;
+  $* -o foo >=out;
   $* -i 1 <<<out >foo
   EOI
   $b
 
-  : append
+  : out
   :
-  $c <<EOI;
-  $* -o foo >>>out;
-  $* -e bar 2>>>&out;
-  $* -i 1 <<<out >>EOO
-  foo
-  bar
-  EOO
-  EOI
-  $b
+  {
+    : match
+    :
+    $c <<EOI;
+    $* -o foo >=out;
+    $* -e bar 2>+out;
+    $* -i 1 <<EOF >>>out
+    foo
+    bar
+    EOF
+    EOI
+    $b
+
+    : mismatch
+    :
+    $c <<EOI;
+    $* -o foo >=out;
+    $* -o bar >>>out
+    EOI
+    $b 2>>/~%EOE%d != 0
+    %testscript:2: error: ../../../../../driver(.exe)? stdout doesn't match the expected output%
+      info: stdout: test/1/stdout-2
+      info: expected stdout: test/1/out
+      info: stdout diff: test/1/stdout-2.diff
+    %--- \.*%
+    %\+\+\+ \.*%
+    %@@ \.*%
+    -foo
+    +bar
+    EOE
+  }
 
   : merge
   :
   $c <<EOI;
-  $* -o foo -e bar 2>&1 >>>out;
-  $* -e baz -o biz 1>&2 2>>>&out;
+  $* -o foo -e bar 2>&1 >=out;
+  $* -e baz -o biz 1>&2 2>+out;
   $* -i 1 <<<out >>EOO
   foo
   bar