diff --git a/tests/libtest-core.sh b/tests/libtest-core.sh
index ae7f381f..d1d3bbdf 100644
--- a/tests/libtest-core.sh
+++ b/tests/libtest-core.sh
@@ -85,6 +85,13 @@ assert_file_has_content () {
     fi
 }
 
+assert_file_has_content_literal () {
+    if ! grep -q -F -e "$2" "$1"; then
+        sed -e 's/^/# /' < "$1" >&2
+        fatal "File '$1' doesn't match fixed string list '$2'"
+    fi
+}
+
 assert_symlink_has_content () {
     if ! test -L "$1"; then
         echo 1>&2 "File '$1' is not a symbolic link"
diff --git a/tests/test-summary-view.sh b/tests/test-summary-view.sh
index afaa5856..6dcfd088 100755
--- a/tests/test-summary-view.sh
+++ b/tests/test-summary-view.sh
@@ -47,20 +47,18 @@ ${CMD_PREFIX} ostree --repo=repo pull --mirror origin
 
 # Check the summary file exists in the checkout, and can be viewed.
 assert_has_file repo/summary
-output=$(${OSTREE} summary --view)
-echo "$output" | sed -e 's/^/# /'
-echo "$output" | grep --quiet --no-messages "* main"
-echo "$output" | grep --quiet --no-messages "* other"
-echo "$output" | grep --quiet --no-messages "ostree.summary.last-modified"
-echo "$output" | grep --quiet --no-messages "Static Deltas (ostree.static-deltas): {}"
+${OSTREE} summary --view > summary.txt
+assert_file_has_content_literal summary.txt "* main"
+assert_file_has_content_literal summary.txt "* other"
+assert_file_has_content_literal summary.txt "ostree.summary.last-modified"
+assert_file_has_content_literal summary.txt "Static Deltas (ostree.static-deltas): {}"
 echo "ok view summary"
 
 # Check the summary can be viewed raw too.
-raw_output=$(${OSTREE} summary --view --raw)
-echo "$raw_output" | sed -e 's/^/# /'
-echo "$raw_output" | grep --quiet --no-messages "('main', ("
-echo "$raw_output" | grep --quiet --no-messages "('other', ("
-echo "$raw_output" | grep --quiet --no-messages "{'ostree.summary.last-modified': <uint64"
+${OSTREE} summary --view --raw > raw-summary.txt
+assert_file_has_content_literal raw-summary.txt "('main', ("
+assert_file_has_content_literal raw-summary.txt "('other', ("
+assert_file_has_content_literal raw-summary.txt "{'ostree.summary.last-modified': <uint64"
 echo "ok view summary raw"
 
 libtest_cleanup_gpg