diff --git a/build_linux.sh b/build_linux.sh
index 6f8340b55..b6d054e7c 100755
--- a/build_linux.sh
+++ b/build_linux.sh
@@ -1,8 +1,8 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 set -e
 cd "$(dirname "$0")"
 
-if [ "$(uname)" == "Darwin" ]; then
+if [ "$(uname)" = "Darwin" ]; then
 	export GOOS="${GOOS:-linux}"
 fi
 
diff --git a/build_windows.sh b/build_windows.sh
index d71cf6868..895909a5e 100755
--- a/build_windows.sh
+++ b/build_windows.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 set -e
 cd "$(dirname "$0")"
 
diff --git a/scripts/release.sh b/scripts/release.sh
index 5002428ed..2b92d28a8 100755
--- a/scripts/release.sh
+++ b/scripts/release.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 set -xe
 
 SRC_DIR="${SRC_DIR:-$PWD}"
diff --git a/test_linux.sh b/test_linux.sh
index 9b29d74f6..fd320d101 100755
--- a/test_linux.sh
+++ b/test_linux.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 #
 # Run CNI plugin tests.
 # 
@@ -10,12 +10,12 @@ set -e
 cd "$(dirname "$0")"
 
 # Build all plugins before testing
-source ./build_linux.sh
+. ./build_linux.sh
 
 echo "Running tests"
 
-function testrun {
-    sudo -E bash -c "umask 0; PATH=${GOPATH}/bin:$(pwd)/bin:${PATH} go test -race $@"
+testrun() {
+    sudo -E sh -c "umask 0; PATH=${GOPATH}/bin:$(pwd)/bin:${PATH} go test -race $*"
 }
 
 COVERALLS=${COVERALLS:-""}
diff --git a/test_windows.sh b/test_windows.sh
index b74fb5700..22c2352a7 100755
--- a/test_windows.sh
+++ b/test_windows.sh
@@ -1,11 +1,11 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 #
 # Run CNI plugin tests.
 #
 set -e
 cd "$(dirname "$0")"
 
-source ./build_windows.sh
+. ./build_windows.sh
 
 echo "Running tests"