diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh
index 39256381a7..5a1925f690 100755
--- a/t/t9300-fast-import.sh
+++ b/t/t9300-fast-import.sh
@@ -1902,7 +1902,7 @@ test_expect_success PIPE 'R: copy using cat-file' '
 
 	read blob_id type size <&3 &&
 	echo "$blob_id $type $size" >response &&
-	dd of=blob bs=$size count=1 <&3 &&
+	dd of=blob bs=1 count=$size <&3 &&
 	read newline <&3 &&
 
 	cat <<EOF &&
@@ -1953,7 +1953,7 @@ test_expect_success PIPE 'R: print blob mid-commit' '
 		EOF
 
 		read blob_id type size <&3 &&
-		dd of=actual bs=$size count=1 <&3 &&
+		dd of=actual bs=1 count=$size <&3 &&
 		read newline <&3 &&
 
 		echo
@@ -1988,7 +1988,7 @@ test_expect_success PIPE 'R: print staged blob within commit' '
 		echo "cat-blob $to_get" &&
 
 		read blob_id type size <&3 &&
-		dd of=actual bs=$size count=1 <&3 &&
+		dd of=actual bs=1 count=$size <&3 &&
 		read newline <&3 &&
 
 		echo deleteall