diff --git a/dap4_test/maketests.sh b/dap4_test/maketests.sh
index 29cf30cf6..1ad1a09b2 100755
--- a/dap4_test/maketests.sh
+++ b/dap4_test/maketests.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # The purpose of this program is to fill in the
 # testdata files: dmrtestfiles, daptestfiles, and
diff --git a/dap4_test/test_raw.sh b/dap4_test/test_raw.sh
index f1e055c8d..a23b22c93 100755
--- a/dap4_test/test_raw.sh
+++ b/dap4_test/test_raw.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 if test "x$srcdir" = x ; then srcdir=`pwd`; fi
 . ../test_common.sh
diff --git a/nc_test/make_test_file.sh b/nc_test/make_test_file.sh
index 119ee5fca..39ecd4469 100755
--- a/nc_test/make_test_file.sh
+++ b/nc_test/make_test_file.sh
@@ -1,2 +1,2 @@
 #! /bin/sh
-./nc_test -c
\ No newline at end of file
+./nc_test -c
diff --git a/nc_test/run_diskless2.sh b/nc_test/run_diskless2.sh
index f0af591cc..3c1a67f01 100755
--- a/nc_test/run_diskless2.sh
+++ b/nc_test/run_diskless2.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 if test "x$srcdir" = x ; then srcdir=`pwd`; fi
 . ../test_common.sh
diff --git a/nc_test4/clear_cache.sh b/nc_test4/clear_cache.sh
index f6c918fdf..fab40eea8 100755
--- a/nc_test4/clear_cache.sh
+++ b/nc_test4/clear_cache.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -x
+#!/bin/sh -x
 # Clear the disk caches.
 sync
 echo 3 > /proc/sys/vm/drop_caches
diff --git a/nc_test4/run_par_bm_radar_2D.sh b/nc_test4/run_par_bm_radar_2D.sh
index b8741d127..f44c09980 100755
--- a/nc_test4/run_par_bm_radar_2D.sh
+++ b/nc_test4/run_par_bm_radar_2D.sh
@@ -22,4 +22,4 @@ for numproc in 1 4 16
 done
 echo '*** SUCCESS!!!'
 
-exit 0
\ No newline at end of file
+exit 0
diff --git a/nc_test4/tst_filter.sh b/nc_test4/tst_filter.sh
index 36df9dbde..2250c039e 100755
--- a/nc_test4/tst_filter.sh
+++ b/nc_test4/tst_filter.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 export SETX=1
 
diff --git a/ncdump/tst_hdf5_offset.sh b/ncdump/tst_hdf5_offset.sh
index 96e8ddbf1..ff37ca707 100755
--- a/ncdump/tst_hdf5_offset.sh
+++ b/ncdump/tst_hdf5_offset.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 if test "x$srcdir" = x ; then srcdir=`pwd`; fi 
 . ../test_common.sh
diff --git a/ncdump/tst_nccopy3_subset.sh b/ncdump/tst_nccopy3_subset.sh
index 16482ed49..598096666 100755
--- a/ncdump/tst_nccopy3_subset.sh
+++ b/ncdump/tst_nccopy3_subset.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 #
 # Added in support of https://github.com/Unidata/netcdf-c/gh425 and
 # https://github.com/Unidata/netcdf-c/gh469
diff --git a/ncdump/tst_nccopy4.sh b/ncdump/tst_nccopy4.sh
index 53797c4d8..80bc6ac3e 100755
--- a/ncdump/tst_nccopy4.sh
+++ b/ncdump/tst_nccopy4.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 if test "x$srcdir" = x ; then srcdir=`pwd`; fi
 . ../test_common.sh
diff --git a/ncdump/tst_nccopy5.sh b/ncdump/tst_nccopy5.sh
index 88f0979bb..bc92c24f2 100755
--- a/ncdump/tst_nccopy5.sh
+++ b/ncdump/tst_nccopy5.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 if test "x$srcdir" = x ; then srcdir=`pwd`; fi
 . ../test_common.sh
diff --git a/ncdump/tst_ncgen4.sh b/ncdump/tst_ncgen4.sh
index 06e481a36..387a2db23 100755
--- a/ncdump/tst_ncgen4.sh
+++ b/ncdump/tst_ncgen4.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 # Tests for ncgen4 using list of test cdl files from the cdl4
 # directory, and comparing output to expected results in the expected4
 # directory. Note that these tests are run for classic files in
diff --git a/ncdump/tst_netcdf4.sh b/ncdump/tst_netcdf4.sh
index 8d1a30b26..ea8514584 100755
--- a/ncdump/tst_netcdf4.sh
+++ b/ncdump/tst_netcdf4.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 # This shell script tests ncdump for netcdf-4
 # Ed Hartnett, Dennis Heimbigner, Ward Fisher
 
diff --git a/ncgen/makeparser.sh b/ncgen/makeparser.sh
index 644a8beca..f4f2866d8 100644
--- a/ncgen/makeparser.sh
+++ b/ncgen/makeparser.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 	flex -Pncg -8 ncgen.l
 	rm -f ncgenl.c
 	sed -e s/lex.ncg.c/ncgenl.c/g <lex.ncg.c >ncgenl.c