5 files changed, 44 insertions, 22 deletions
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