diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 112f82d..28c54f9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,5 +19,40 @@ jobs:
       - name: Build
         run: make
         
-      - name: Test
-        run: make check
+      - name: Test (main test script)
+        run: ./RunTest
+
+      - name: Test (JIT test program)
+        run: ./pcre2_jit_test
+
+      - name: Test (pcre2grep test script)
+        run: ./RunGrepTest
+
+  alpine:
+    name: alpine
+    runs-on: ubuntu-latest
+    container: alpine 
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        
+      - name: Autotools
+        run: apk add --no-cache automake autoconf gcc libtool make musl-dev 
+        
+      - name: Autogen
+        run: ./autogen.sh
+        
+      - name: Configure
+        run: ./configure --enable-jit --enable-pcre2-8 --enable-pcre2-16 --enable-pcre2-32
+        
+      - name: Build
+        run: make
+        
+      - name: Test (main test script)
+        run: ./RunTest
+
+      - name: Test (JIT test program)
+        run: ./pcre2_jit_test
+
+      - name: Test (pcre2grep test script)
+        run: ./RunGrepTest
diff --git a/ChangeLog b/ChangeLog
index 856250f..5453ecc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,14 @@ Change Log for PCRE2
 --------------------
 
 
+Version 10.41 xx-xxx-2022
+-------------------------
+
+1. Add fflush() before and after a fork callout in pcre2grep to get its output
+to be the same on all systems. (THere were previously ordering differences in 
+Alpine Linux).
+
+
 Version 10.40 15-April-2022
 ---------------------------
 
diff --git a/src/pcre2grep.c b/src/pcre2grep.c
index 2335d0d..030e50d 100644
--- a/src/pcre2grep.c
+++ b/src/pcre2grep.c
@@ -13,7 +13,7 @@ distribution because other apparatus is needed to compile pcre2grep for z/OS.
 The header can be found in the special z/OS distribution, which is available
 from www.zaconsultants.net or from www.cbttape.org.
 
-           Copyright (c) 1997-2020 University of Cambridge
+           Copyright (c) 1997-2022 University of Cambridge
 
 -----------------------------------------------------------------------------
 Redistribution and use in source and binary forms, with or without
@@ -2437,7 +2437,11 @@ if (pid == 0)
   exit(1);
   }
 else if (pid > 0)
+  {
+  (void)fflush(stdout); 
   (void)waitpid(pid, &result, 0);
+  (void)fflush(stdout); 
+  } 
 #endif  /* End Windows/VMS/other handling */
 
 free(args);
diff --git a/testdata/grepoutputC b/testdata/grepoutputC
index 87897f0..9255c0a 100644
--- a/testdata/grepoutputC
+++ b/testdata/grepoutputC
@@ -1,26 +1,26 @@
 Arg1: [T] [he ] [ ] Arg2: |T| () () (0)
-Arg1: [T] [his] [s] Arg2: |T| () () (0)
-Arg1: [T] [his] [s] Arg2: |T| () () (0)
-Arg1: [T] [he ] [ ] Arg2: |T| () () (0)
-Arg1: [T] [he ] [ ] Arg2: |T| () () (0)
-Arg1: [T] [he ] [ ] Arg2: |T| () () (0)
 The quick brown
+Arg1: [T] [his] [s] Arg2: |T| () () (0)
 This time it jumps and jumps and jumps.
+Arg1: [T] [his] [s] Arg2: |T| () () (0)
 This line contains \E and (regex) *meta* [characters].
+Arg1: [T] [he ] [ ] Arg2: |T| () () (0)
 The word is cat in this line
+Arg1: [T] [he ] [ ] Arg2: |T| () () (0)
 The caterpillar sat on the mat
+Arg1: [T] [he ] [ ] Arg2: |T| () () (0)
 The snowcat is not an animal
 Arg1: [qu] [qu]
-Arg1: [ t] [ t]
-Arg1: [ l] [ l]
-Arg1: [wo] [wo]
-Arg1: [ca] [ca]
-Arg1: [sn] [sn]
 The quick brown
+Arg1: [ t] [ t]
 This time it jumps and jumps and jumps.
+Arg1: [ l] [ l]
 This line contains \E and (regex) *meta* [characters].
+Arg1: [wo] [wo]
 The word is cat in this line
+Arg1: [ca] [ca]
 The caterpillar sat on the mat
+Arg1: [sn] [sn]
 The snowcat is not an animal
 0:T
 The quick brown