diff --git a/tests/ossfuzz/Makefile b/tests/ossfuzz/Makefile
index a25bd0db..742e0636 100644
--- a/tests/ossfuzz/Makefile
+++ b/tests/ossfuzz/Makefile
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: 0BSD
+
 FUZZ_TARGET_SRCS = $(wildcard *.c)
 FUZZ_TARGET_BINS = $(FUZZ_TARGET_SRCS:.c=)
 
diff --git a/tests/ossfuzz/config/fuzz_decode_alone.options b/tests/ossfuzz/config/fuzz_decode_alone.options
index 0747b68c..1351d96c 100644
--- a/tests/ossfuzz/config/fuzz_decode_alone.options
+++ b/tests/ossfuzz/config/fuzz_decode_alone.options
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: 0BSD
+
 [libfuzzer]
 max_len = 4096
 dict = fuzz_lzma.dict
diff --git a/tests/ossfuzz/config/fuzz_decode_stream.options b/tests/ossfuzz/config/fuzz_decode_stream.options
index d8f9edba..bbf43ac4 100644
--- a/tests/ossfuzz/config/fuzz_decode_stream.options
+++ b/tests/ossfuzz/config/fuzz_decode_stream.options
@@ -1,2 +1,4 @@
+# SPDX-License-Identifier: 0BSD
+
 [libfuzzer]
 dict = fuzz_xz.dict
diff --git a/tests/ossfuzz/config/fuzz_encode_stream.options b/tests/ossfuzz/config/fuzz_encode_stream.options
index 9fda93fc..86d4f0c6 100644
--- a/tests/ossfuzz/config/fuzz_encode_stream.options
+++ b/tests/ossfuzz/config/fuzz_encode_stream.options
@@ -1,2 +1,4 @@
+# SPDX-License-Identifier: 0BSD
+
 [libfuzzer]
 max_len = 4096
diff --git a/tests/ossfuzz/config/fuzz_lzma.dict b/tests/ossfuzz/config/fuzz_lzma.dict
index 82a2b871..b9d5dff7 100644
--- a/tests/ossfuzz/config/fuzz_lzma.dict
+++ b/tests/ossfuzz/config/fuzz_lzma.dict
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: 0BSD
+
 # first 5 header bytes of .lzma archives based on the info from
 # /doc/lzma-file-format.txt
 
diff --git a/tests/ossfuzz/config/fuzz_xz.dict b/tests/ossfuzz/config/fuzz_xz.dict
index 932d67c2..6ba4f24a 100644
--- a/tests/ossfuzz/config/fuzz_xz.dict
+++ b/tests/ossfuzz/config/fuzz_xz.dict
@@ -1,2 +1,4 @@
+# SPDX-License-Identifier: 0BSD
+
 "\xFD7zXZ\x00"
 "YZ"