diff --git a/.gitignore b/.gitignore
index 13638fcd..0915625a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,6 @@ fuzz/build/
 fuzz/corpus.tgz-
 fuzz/fuzz_*/
 fuzz/obj/
-fuzz/report.html
+fuzz/report
 fuzz/*.so
 output/
diff --git a/fuzz/Makefile b/fuzz/Makefile
index 6c85a0bd..c8fe0b88 100644
--- a/fuzz/Makefile
+++ b/fuzz/Makefile
@@ -46,9 +46,11 @@ profdata: run
 	docker exec ${RUNNER} /bin/bash -c 'rm -f /$@ && ${PROFDATA} \
 		merge -sparse profraw/* -o $@'
 
-report.html: profdata
-	docker exec ${RUNNER} ${COV} show -format=html -tab-size=8 \
-		/libfido2/build/src/libfido2.so -instr-profile=/$< > $@
+report.tgz: profdata
+	docker exec ${RUNNER} /bin/bash -c 'rm -rf /report && mkdir /report && \
+		${COV} show -format=html -tab-size=8 -instr-profile=/$< \
+		-output-dir=/report /libfido2/build/src/libfido2.so'
+	docker exec -i ${RUNNER} tar Czcf / - report > $@
 
 summary.txt: profdata
 	docker exec ${RUNNER} ${COV} report -use-color=false \
@@ -73,4 +75,4 @@ corpus.tgz: ${CORPORA}
 	tar zcf $@ ${TARGETS}
 
 .PHONY: build run sync corpus ${TARGETS} ${CORPORA}
-.PHONY: report.html summary.txt functions.txt
+.PHONY: report.tgz summary.txt functions.txt
diff --git a/fuzz/report.html.gz b/fuzz/report.html.gz
deleted file mode 100644
index 13141477..00000000
Binary files a/fuzz/report.html.gz and /dev/null differ
diff --git a/fuzz/report.tgz b/fuzz/report.tgz
new file mode 100644
index 00000000..25a23e0b
Binary files /dev/null and b/fuzz/report.tgz differ