diff --git a/t/annotate-tests.sh b/t/annotate-tests.sh
index 3aee61d2cc..a2e46572d5 100644
--- a/t/annotate-tests.sh
+++ b/t/annotate-tests.sh
@@ -483,12 +483,12 @@ test_expect_success 'setup -L :funcname with userdiff driver' '
 	echo "fortran-* diff=fortran" >.gitattributes &&
 	fortran_file=fortran-external-function &&
 	orig_file="$TEST_DIRECTORY/t4018/$fortran_file" &&
-	cp $orig_file . &&
-	git add $fortran_file &&
+	cp "$orig_file" . &&
+	git add "$fortran_file" &&
 	GIT_AUTHOR_NAME="A" GIT_AUTHOR_EMAIL="A@test.git" \
 	git commit -m "add fortran file" &&
-	sed -e "s/ChangeMe/IWasChanged/" <"$orig_file" >$fortran_file &&
-	git add $fortran_file &&
+	sed -e "s/ChangeMe/IWasChanged/" <"$orig_file" >"$fortran_file" &&
+	git add "$fortran_file" &&
 	GIT_AUTHOR_NAME="B" GIT_AUTHOR_EMAIL="B@test.git" \
 	git commit -m "change fortran file"
 '