diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ccc7806..6cdc3b7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -30,6 +30,5 @@ jobs:
         name: Install Windows dependencies
         run: choco install winflexbison
 
-      - if: matrix.os == 'ubuntu-latest' || matrix.os == 'macos-latest'
-        name: Run tests
+      - name: Run tests
         run: script/cibuild
diff --git a/script/cibuild b/script/cibuild
index e819a05..d7393e5 100755
--- a/script/cibuild
+++ b/script/cibuild
@@ -1,58 +1,15 @@
-#!/bin/sh
+#!/bin/bash
+
+set -e
 
 mkdir -p build
-cd build
+cd build || exit 1
 cmake ..
 make
 ctest -V
 
-echo 'inline'
-echo '\sin y'     | ./mtex2MML --inline | grep "display='inline'" || exit 1
-echo ''
-
-echo 'display'
-echo '\sin y'     | ./mtex2MML --display | grep "display='block'" || exit 1
-echo ''
-
-echo 'inline print-mtex'
-echo '\sin y'     | ./mtex2MML --inline --print-mtex | grep '$\\sin y\$'|| exit 1
-echo ''
-
-echo 'display print-mtex'
-echo '\sin y'     | ./mtex2MML --display --print-mtex | grep '$$\\sin y\$\$' || exit 1
-echo ''
-
-echo 'dollar'
-echo '$\sin y$'   | ./mtex2MML | grep "display='inline'" || exit 1
-
-echo 'double dollar'
-echo '$$\sin y$$' | ./mtex2MML | grep "display='block'" || exit 1
-
-echo 'parens'
-echo '\(\sin y\)' | ./mtex2MML | grep "display='inline'" || exit 1
-
-echo 'brackets'
-echo '\[\sin y\]' | ./mtex2MML | grep "display='block'" || exit 1
-
-echo 'dollar use-dollar'
-echo '$\sin y$'   | ./mtex2MML --use-dollar | grep "display='inline'" || exit 1
-
-echo 'double dollar use-double'
-echo '$$\sin y$$' | ./mtex2MML --use-double | grep "display='block'" || exit 1
-
-echo 'parens use-parens'
-echo '\(\sin y\)' | ./mtex2MML --use-parens | grep "display='inline'" || exit 1
-
-echo 'brackets use-brackets'
-echo '\[\sin y\]' | ./mtex2MML --use-brackets | grep "display='block'" || exit 1
-
-echo 'env use-env'
-echo '\\begin{align}3x + 9y &=  -12\\end{align}' | ./mtex2MML --use-env | grep "display='block'" || exit 1
-
-echo 'DONE with command check'
-
 if [ -n "$CI" ]; then
-  if [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
+  if [[ "$(uname -s)" == "Linux" ]] ; then
     make memcheck
   fi
 fi
diff --git a/script/test-quick b/script/test-quick
new file mode 100755
index 0000000..6f01432
--- /dev/null
+++ b/script/test-quick
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+set -e
+
+echo 'inline'
+echo '\sin y'     | ./mtex2MML --inline | grep "display='inline'" || exit 1
+echo ''
+
+echo 'display'
+echo '\sin y'     | ./mtex2MML --display | grep "display='block'" || exit 1
+echo ''
+
+echo 'inline print-mtex'
+echo '\sin y'     | ./mtex2MML --inline --print-mtex | grep '$\\sin y\$'|| exit 1
+echo ''
+
+echo 'display print-mtex'
+echo '\sin y'     | ./mtex2MML --display --print-mtex | grep '$$\\sin y\$\$' || exit 1
+echo ''
+
+echo 'dollar'
+echo '$\sin y$'   | ./mtex2MML | grep "display='inline'" || exit 1
+
+echo 'double dollar'
+echo '$$\sin y$$' | ./mtex2MML | grep "display='block'" || exit 1
+
+echo 'parens'
+echo '\(\sin y\)' | ./mtex2MML | grep "display='inline'" || exit 1
+
+echo 'brackets'
+echo '\[\sin y\]' | ./mtex2MML | grep "display='block'" || exit 1
+
+echo 'dollar use-dollar'
+echo '$\sin y$'   | ./mtex2MML --use-dollar | grep "display='inline'" || exit 1
+
+echo 'double dollar use-double'
+echo '$$\sin y$$' | ./mtex2MML --use-double | grep "display='block'" || exit 1
+
+echo 'parens use-parens'
+echo '\(\sin y\)' | ./mtex2MML --use-parens | grep "display='inline'" || exit 1
+
+echo 'brackets use-brackets'
+echo '\[\sin y\]' | ./mtex2MML --use-brackets | grep "display='block'" || exit 1
+
+echo 'env use-env'
+echo '\\begin{align}3x + 9y &=  -12\\end{align}' | ./mtex2MML --use-env | grep "display='block'" || exit 1
+
+echo 'DONE with command check'