diff --git a/testing/ios/IosUnitTests/build_and_run_tests.sh b/testing/ios/IosUnitTests/build_and_run_tests.sh
index f307604a5b048..076844bd202ea 100755
--- a/testing/ios/IosUnitTests/build_and_run_tests.sh
+++ b/testing/ios/IosUnitTests/build_and_run_tests.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 pushd $PWD
 cd ../../../..
 ./flutter/tools/gn --ios --simulator --unoptimized
diff --git a/testing/ios/IosUnitTests/run_tests.sh b/testing/ios/IosUnitTests/run_tests.sh
index 806693a923211..23f39d2873421 100755
--- a/testing/ios/IosUnitTests/run_tests.sh
+++ b/testing/ios/IosUnitTests/run_tests.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 FLUTTER_ENGINE=ios_debug_sim_unopt
 
 if [ $# -eq 1 ]; then