diff --git a/tests/scripts/update_metadata.sh b/tests/scripts/update_metadata.sh
index d3b97f3ab..c6afc8ad0 100755
--- a/tests/scripts/update_metadata.sh
+++ b/tests/scripts/update_metadata.sh
@@ -10,25 +10,29 @@ blockly_size=$(wc -c < "build/blockly_compressed.js")
 blocks_size=$(wc -c < "build/blocks_compressed.js")
 blockly_gz_size=$(wc -c < "build/blockly_compressed.js.gz")
 blocks_gz_size=$(wc -c < "build/blocks_compressed.js.gz")
-quarter=$(date "+Q%q %Y")
+quarters=(1 1 1 2 2 2 3 3 3 4 4 4)
+month=$(date +%-m)
+quarter=$(echo Q${quarters[$month - 1]} $(date +%Y))
 version=$(npx -c 'echo "$npm_package_version"')
 
 replacement="# ${quarter}\t${version}\t${blockly_size}\n"
 replacement+="readonly BLOCKLY_SIZE_EXPECTED=${blockly_size}"
-sed -ri "s/readonly BLOCKLY_SIZE_EXPECTED=[0-9]+/${replacement}/g" \
+sed -ri.bak "s/readonly BLOCKLY_SIZE_EXPECTED=[0-9]+/${replacement}/g" \
   tests/scripts/check_metadata.sh
 
 replacement="# ${quarter}\t${version}\t${blocks_size}\n"
 replacement+="readonly BLOCKS_SIZE_EXPECTED=${blocks_size}"
-sed -ri "s/readonly BLOCKS_SIZE_EXPECTED=[0-9]+/${replacement}/g" \
+sed -ri.bak "s/readonly BLOCKS_SIZE_EXPECTED=[0-9]+/${replacement}/g" \
   tests/scripts/check_metadata.sh
 
 replacement="# ${quarter}\t${version}\t${blockly_gz_size}\n"
 replacement+="readonly BLOCKLY_GZ_SIZE_EXPECTED=${blockly_gz_size}"
-sed -ri "s/readonly BLOCKLY_GZ_SIZE_EXPECTED=[0-9]+/${replacement}/g" \
+sed -ri.bak "s/readonly BLOCKLY_GZ_SIZE_EXPECTED=[0-9]+/${replacement}/g" \
   tests/scripts/check_metadata.sh
 
 replacement="# ${quarter}\t${version}\t${blocks_gz_size}\n"
 replacement+="readonly BLOCKS_GZ_SIZE_EXPECTED=${blocks_gz_size}"
-sed -ri "s/readonly BLOCKS_GZ_SIZE_EXPECTED=[0-9]+/${replacement}/g" \
-  tests/scripts/check_metadata.sh
\ No newline at end of file
+sed -ri.bak "s/readonly BLOCKS_GZ_SIZE_EXPECTED=[0-9]+/${replacement}/g" \
+  tests/scripts/check_metadata.sh
+
+rm tests/scripts/check_metadata.sh.bak
\ No newline at end of file