diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 92eee7a2..b8954e27 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -11,7 +11,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: ["ubuntu:22.04", "almalinux:9"]
+        os: ["ubuntu:22.04", "almalinux:9", "amazonlinux:2023"]
     uses: ./.github/workflows/build.yml
     with:
       os: ${{ matrix.os }}
@@ -21,7 +21,7 @@ jobs:
     strategy:
       matrix:
         test_name: ["command-line-options", "data-rep", "i18n_sjis", "jp-compat", "run", "syntax"]
-        os: ["ubuntu:22.04", "almalinux:9"]
+        os: ["ubuntu:22.04", "almalinux:9", "amazonlinux:2023"]
     uses: ./.github/workflows/test-other.yml
     with:
       test-name: ${{ matrix.test_name }}
@@ -32,7 +32,7 @@ jobs:
     strategy:
       matrix:
         test_name: ["IC", "IF", "IX", "NC", "OB", "RL", "SG", "SM", "SQ", "ST"]
-        os: ["ubuntu:22.04", "almalinux:9"]
+        os: ["ubuntu:22.04", "almalinux:9", "amazonlinux:2023"]
     uses: ./.github/workflows/test-nist.yml
     with:
       test-name: ${{ matrix.test_name }}
@@ -44,7 +44,7 @@ jobs:
     strategy:
       matrix:
         test_name: ["CM", "DB", "RW"]
-        os: ["ubuntu:22.04", "almalinux:9"]
+        os: ["ubuntu:22.04", "almalinux:9", "amazonlinux:2023"]
     uses: ./.github/workflows/test-nist.yml
     with:
       test-name: ${{ matrix.test_name }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b4f406a6..0288b814 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 ### Added
+* Support Amazon Linux 2023 (#282)
 * Implement runtime numeric checkings (#253)
 * Implement sorting a table based on ebcdic (#254)
 * Implement KEY IS option of SORT statements (#259)
diff --git a/tests/command-line-options.src/fsyntax-only.at b/tests/command-line-options.src/fsyntax-only.at
index 58128900..a16d9c4b 100644
--- a/tests/command-line-options.src/fsyntax-only.at
+++ b/tests/command-line-options.src/fsyntax-only.at
@@ -39,7 +39,7 @@ AT_CHECK([for f in ./*; do echo $f; done | sort], [0],
 ./prog2.cbl
 ./prog3.cbl
 ])
-AT_CHECK([cobj --help | grep '\-fsyntax\-only' > /dev/null], [0])
+AT_CHECK([cobj --help | grep '@<:@-@:>@fsyntax@<:@-@:>@only' > /dev/null], [0])
 
 
 AT_CLEANUP
diff --git a/tests/command-line-options.src/jar.at b/tests/command-line-options.src/jar.at
index 924d0c1d..5f527234 100644
--- a/tests/command-line-options.src/jar.at
+++ b/tests/command-line-options.src/jar.at
@@ -25,8 +25,8 @@ AT_DATA([sub.cbl], [
            DISPLAY B.
 ])
 
-AT_CHECK([${COBJ} --help | grep ' \-jar' > /dev/null], [0])
-AT_CHECK([${COBJ} --help | grep '\-single-jar' > /dev/null], [0])
+AT_CHECK([${COBJ} --help | grep ' @<:@-@:>@jar' > /dev/null], [0])
+AT_CHECK([${COBJ} --help | grep '@<:@-@:>@single@<:@-@:>@jar' > /dev/null], [0])
 
 AT_CHECK([mkdir tmp])