diff --git a/build/tasks/certs.js b/build/tasks/certs.js
index fe486819d2..1c4317779b 100644
--- a/build/tasks/certs.js
+++ b/build/tasks/certs.js
@@ -31,8 +31,7 @@ gulp.task('get-crypto-binaries-amd64', shell.task(
 );
 
 gulp.task('get-crypto-binaries-mac', shell.task(
-	'mkdir -p ' + binariesPath + ';' +
-	'wget ' + darwinBinaries + ' -P ' + binariesPath + ';' +
+	'curl --create-dirs --output ' + binariesPath + '/' + darwinTarFile + ' ' + darwinBinaries + ';' +
 	'tar xvzf ' + binariesPath + '/' + darwinTarFile + ' -C ' + binariesPath + ';')
 );
 
diff --git a/test/fixtures/crypto-material/config-base/generate.sh b/test/fixtures/crypto-material/config-base/generate.sh
index 82426e99d6..b53f490f0d 100755
--- a/test/fixtures/crypto-material/config-base/generate.sh
+++ b/test/fixtures/crypto-material/config-base/generate.sh
@@ -4,34 +4,34 @@
 #
 
 # Set the path to teh crypto material to ensure it may be used
-CRYPTOGEN=$1
-export PATH=${PATH}:${CRYPTOGEN}
+CRYPTOGEN="$1"
+export PATH="${PATH}:${CRYPTOGEN}"
 
 # Get current location to ensure things go to the correct place
-BASEDIR=$(dirname $(realpath $0))
+BASEDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
 # Start generating
 echo "Creating new crypto material and tx blocks from within directory ${BASEDIR}"
-rm -rf ${BASEDIR}/../crypto-config
-rm -rf ${BASEDIR}/../channel-config
-mkdir ${BASEDIR}/../crypto-config
-mkdir ${BASEDIR}/../channel-config
+rm -rf "${BASEDIR}/../crypto-config"
+rm -rf "${BASEDIR}/../channel-config"
+mkdir "${BASEDIR}/../crypto-config"
+mkdir "${BASEDIR}/../channel-config"
 
 echo 'Generating base crypto-material and channel tx files....'
-export FABRIC_CFG_PATH=${BASEDIR}
-cryptogen generate --config=${BASEDIR}/crypto-config.yaml --output=${BASEDIR}/../crypto-config
-configtxgen -profile TwoOrgsOrdererGenesis -outputBlock ${BASEDIR}/twoorgs.genesis.block
-configtxgen -profile TwoOrgsChannel -outputCreateChannelTx ${BASEDIR}/../channel-config/mychannel.tx -channelID mychannel
-configtxgen -profile TwoOrgsChannel -outputCreateChannelTx ${BASEDIR}/../channel-config/mychannel2.tx -channelID mychannel2 #test/integration/network-config.js
-configtxgen -profile TwoOrgsChannel -outputCreateChannelTx ${BASEDIR}/../channel-config/mychanneltx.tx -channelID mychanneltx #test/integration/create-configtx-channel.js
-configtxgen -profile TwoOrgsChannel -outputCreateChannelTx ${BASEDIR}/../channel-config/mychannelts.tx -channelID mychannelts #test/typescript
-configtxgen -profile TwoOrgsChannel -outputCreateChannelTx ${BASEDIR}/../channel-config/adminconfig.tx -channelID adminconfig #test/only-admin.js
-configtxgen -profile TwoOrgsChannel -outputCreateChannelTx ${BASEDIR}/../channel-config/discovery.tx -channelID discovery #test/integration/discovery.js
+export FABRIC_CFG_PATH="${BASEDIR}"
+cryptogen generate --config="${BASEDIR}/crypto-config.yaml" --output="${BASEDIR}/../crypto-config"
+configtxgen -profile TwoOrgsOrdererGenesis -outputBlock "${BASEDIR}/twoorgs.genesis.block"
+configtxgen -profile TwoOrgsChannel -outputCreateChannelTx "${BASEDIR}/../channel-config/mychannel.tx" -channelID mychannel
+configtxgen -profile TwoOrgsChannel -outputCreateChannelTx "${BASEDIR}/../channel-config/mychannel2.tx" -channelID mychannel2 #test/integration/network-config.js
+configtxgen -profile TwoOrgsChannel -outputCreateChannelTx "${BASEDIR}/../channel-config/mychanneltx.tx" -channelID mychanneltx #test/integration/create-configtx-channel.js
+configtxgen -profile TwoOrgsChannel -outputCreateChannelTx "${BASEDIR}/../channel-config/mychannelts.tx" -channelID mychannelts #test/typescript
+configtxgen -profile TwoOrgsChannel -outputCreateChannelTx "${BASEDIR}/../channel-config/adminconfig.tx" -channelID adminconfig #test/only-admin.js
+configtxgen -profile TwoOrgsChannel -outputCreateChannelTx "${BASEDIR}/../channel-config/discovery.tx" -channelID discovery #test/integration/discovery.js
 
 echo 'Generating crypto-material complete, now renaming keys...'
 # Rename the key files we use to be key.pem instead of a uuid
-for KEY in $(find ${BASEDIR}/../crypto-config -type f -name "*_sk"); do
-    KEY_DIR=$(dirname ${KEY})
-    mv ${KEY} ${KEY_DIR}/key.pem
+for KEY in $(find "${BASEDIR}/../crypto-config" -type f -name "*_sk"); do
+    KEY_DIR="$(dirname ${KEY})"
+    mv ${KEY} "${KEY_DIR}/key.pem"
 done
 echo 'Renaming keys complete'
diff --git a/test/fixtures/crypto-material/config-update/generate.sh b/test/fixtures/crypto-material/config-update/generate.sh
index 8b05ddce7c..e463ac08c3 100755
--- a/test/fixtures/crypto-material/config-update/generate.sh
+++ b/test/fixtures/crypto-material/config-update/generate.sh
@@ -4,15 +4,15 @@
 #
 
 # Set the path to teh crypto material to ensure it may be used
-CRYPTOGEN=$1
-export PATH=${PATH}:${CRYPTOGEN}
+CRYPTOGEN="$1"
+export PATH="${PATH}:${CRYPTOGEN}"
 
 # Get current location to ensure things go to the correct place
-BASEDIR=$(dirname $(realpath $0))
+BASEDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
 echo
 echo "Creating new channel update tx blocks from within directory ${BASEDIR}"
-export FABRIC_CFG_PATH=$BASEDIR
-configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate ${BASEDIR}/../channel-config/mychannel-org1anchor.tx -channelID mychannel -asOrg Org1MSP
-configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate ${BASEDIR}/../channel-config/discovery_anchor.tx -channelID discovery -asOrg Org1MSP
+export FABRIC_CFG_PATH="$BASEDIR"
+configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate "${BASEDIR}/../channel-config/mychannel-org1anchor.tx" -channelID mychannel -asOrg Org1MSP
+configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate "${BASEDIR}/../channel-config/discovery_anchor.tx" -channelID discovery -asOrg Org1MSP
 
diff --git a/test/fixtures/crypto-material/generateAll.sh b/test/fixtures/crypto-material/generateAll.sh
index a199606c45..1d5f1d6c6e 100755
--- a/test/fixtures/crypto-material/generateAll.sh
+++ b/test/fixtures/crypto-material/generateAll.sh
@@ -6,8 +6,8 @@ CRYPTOGEN=$1
 echo ''
 echo "Crypto-gen scripts running based on binaries location ${CRYPTOGEN}"
 
-BASEDIR=$(dirname $(realpath $0))
-${BASEDIR}/config-base/generate.sh ${CRYPTOGEN}
-${BASEDIR}/config-update/generate.sh ${CRYPTOGEN}
+BASEDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+"${BASEDIR}/config-base/generate.sh" ${CRYPTOGEN}
+"${BASEDIR}/config-update/generate.sh" ${CRYPTOGEN}
 
 echo ''
diff --git a/test/fixtures/fabricca/generateCSR.sh b/test/fixtures/fabricca/generateCSR.sh
index 456ecbbb31..2bc3f872a9 100755
--- a/test/fixtures/fabricca/generateCSR.sh
+++ b/test/fixtures/fabricca/generateCSR.sh
@@ -1,6 +1,10 @@
+#!/bin/bash
+#
+# SPDX-License-Identifier: Apache-2.0
+#
 
-BASEDIR=$(dirname $(realpath $0))
+BASEDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 echo "Generating fabricca cetificates and keys in directory ${BASEDIR}"
-openssl req -nodes -newkey rsa:2048 -keyout ${BASEDIR}/test.key -out ${BASEDIR}/test.csr -subj "/C=GB/ST=London/L=London/O=Global Security/OU=IT Department/CN=aTestUser"
-openssl req -nodes -newkey rsa:512 -keyout ${BASEDIR}/enroll-key.pem -out ${BASEDIR}/enroll-csr.pem -subj "/C=GB/ST=London/L=London/O=Global Security/OU=IT Department/CN=testUser"
+openssl req -nodes -newkey rsa:2048 -keyout "${BASEDIR}/test.key" -out "${BASEDIR}/test.csr" -subj "/C=GB/ST=London/L=London/O=Global Security/OU=IT Department/CN=aTestUser"
+openssl req -nodes -newkey rsa:512 -keyout "${BASEDIR}/enroll-key.pem" -out "${BASEDIR}/enroll-csr.pem" -subj "/C=GB/ST=London/L=London/O=Global Security/OU=IT Department/CN=testUser"
 echo "Generation complete"