diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
index db16ab71b..1b122ee8d 100644
--- a/tests/data_files/Makefile
+++ b/tests/data_files/Makefile
@@ -1275,7 +1275,7 @@ pkcs7_test_cert_3 = pkcs7-rsa-sha256-3.crt
 pkcs7_test_file = pkcs7_data.bin
 
 $(pkcs7_test_file):
-	echo -e "Hello\xd" > $@
+	printf "Hello\15\n" > $@
 all_final += $(pkcs7_test_file)
 
 pkcs7_zerolendata.bin:
@@ -1283,7 +1283,7 @@ pkcs7_zerolendata.bin:
 all_final += pkcs7_zerolendata.bin
 
 pkcs7_data_1.bin:
-	echo -e "2\xd" > $@
+	printf "2\15\n" > $@
 all_final += pkcs7_data_1.bin
 
 # Generate signing cert
@@ -1363,19 +1363,31 @@ all_final += pkcs7_data_multiple_certs_signed.der
 # pkcs7 signature file with corrupted CERT
 pkcs7_data_signed_badcert.der: pkcs7_data_cert_signed_sha256.der
 	cp pkcs7_data_cert_signed_sha256.der $@
-	echo -en '\xa1' | dd of=$@ bs=1 seek=547 conv=notrunc
+	echo 'a1' | xxd -r -p | dd of=$@ bs=1 seek=547 conv=notrunc
 all_final += pkcs7_data_signed_badcert.der
 
 # pkcs7 signature file with corrupted signer info
 pkcs7_data_signed_badsigner.der: pkcs7_data_cert_signed_sha256.der
 	cp pkcs7_data_cert_signed_sha256.der $@
-	echo -en '\xa1' | dd of=$@ bs=1 seek=918 conv=notrunc
+	echo 'a1' | xxd -r -p | dd of=$@ bs=1 seek=918 conv=notrunc
 all_final += pkcs7_data_signed_badsigner.der
 
+# pkcs7 signature file with invalid tag in signerInfo[1].serial after long issuer name
+pkcs7_signerInfo_1_serial_invalid_tag_after_long_name.der: pkcs7_data_multiple_signed.der
+	cp $< $@
+	echo 'a1' | xxd -r -p | dd of=$@ bs=1 seek=498 conv=notrunc
+all_final += pkcs7_signerInfo_1_serial_invalid_tag_after_long_name.der
+
+# pkcs7 signature file with invalid tag in signerInfo[2]
+pkcs7_signerInfo_2_invalid_tag.der: pkcs7_data_3_signed.der
+	cp $< $@
+	echo 'a1' | xxd -r -p | dd of=$@ bs=1 seek=810 conv=notrunc
+all_final += pkcs7_signerInfo_2_invalid_tag.der
+
 # pkcs7 file with version 2
 pkcs7_data_cert_signed_v2.der: pkcs7_data_cert_signed_sha256.der
 	cp pkcs7_data_cert_signed_sha256.der $@
-	echo -en '\x02' | dd of=$@ bs=1 seek=25 conv=notrunc
+	echo '02' | xxd -r -p | dd of=$@ bs=1 seek=25 conv=notrunc
 all_final += pkcs7_data_cert_signed_v2.der
 
 pkcs7_data_cert_encrypted.der: $(pkcs7_test_file) $(pkcs7_test_cert_1)
@@ -1386,12 +1398,12 @@ all_final += pkcs7_data_cert_encrypted.der
 # For some interesting sizes, what happens if we make them off-by-one?
 pkcs7_signerInfo_issuer_invalid_size.der: pkcs7_data_cert_signed_sha256.der
 	cp $< $@
-	echo -en '\x35' | dd of=$@ seek=919 bs=1 conv=notrunc
+	echo '35' | xxd -r -p | dd of=$@ seek=919 bs=1 conv=notrunc
 all_final += pkcs7_signerInfo_issuer_invalid_size.der
 
 pkcs7_signerInfo_serial_invalid_size.der: pkcs7_data_cert_signed_sha256.der
 	cp $< $@
-	echo -en '\x15' | dd of=$@ seek=973 bs=1 conv=notrunc
+	echo '15' | xxd -r -p | dd of=$@ seek=973 bs=1 conv=notrunc
 all_final += pkcs7_signerInfo_serial_invalid_size.der
 
 # pkcs7 signature file just with signed data
diff --git a/tests/data_files/pkcs7_get_signers_info_set-leak-fuzz_pkcs7-4541044530479104.der b/tests/data_files/pkcs7_get_signers_info_set-leak-fuzz_pkcs7-4541044530479104.der
deleted file mode 100644
index 51aef0d09..000000000
Binary files a/tests/data_files/pkcs7_get_signers_info_set-leak-fuzz_pkcs7-4541044530479104.der and /dev/null differ
diff --git a/tests/data_files/pkcs7_get_signers_info_set-missing_free-fuzz_pkcs7-6213931373035520.der b/tests/data_files/pkcs7_get_signers_info_set-missing_free-fuzz_pkcs7-6213931373035520.der
deleted file mode 100644
index ce4fb3bd4..000000000
Binary files a/tests/data_files/pkcs7_get_signers_info_set-missing_free-fuzz_pkcs7-6213931373035520.der and /dev/null differ
diff --git a/tests/data_files/pkcs7_signerInfo_1_serial_invalid_tag_after_long_name.der b/tests/data_files/pkcs7_signerInfo_1_serial_invalid_tag_after_long_name.der
new file mode 100644
index 000000000..fe5539006
Binary files /dev/null and b/tests/data_files/pkcs7_signerInfo_1_serial_invalid_tag_after_long_name.der differ
diff --git a/tests/data_files/pkcs7_signerInfo_2_invalid_tag.der b/tests/data_files/pkcs7_signerInfo_2_invalid_tag.der
new file mode 100644
index 000000000..3a4287426
Binary files /dev/null and b/tests/data_files/pkcs7_signerInfo_2_invalid_tag.der differ
diff --git a/tests/suites/test_suite_pkcs7.data b/tests/suites/test_suite_pkcs7.data
index 9948537aa..da8146bc1 100644
--- a/tests/suites/test_suite_pkcs7.data
+++ b/tests/suites/test_suite_pkcs7.data
@@ -78,13 +78,13 @@ PKCS7 Signed Data Parse Failure Corrupt signerInfo.serial #15.2
 depends_on:MBEDTLS_SHA256_C
 pkcs7_parse:"data_files/pkcs7_signerInfo_serial_invalid_size.der":MBEDTLS_ERR_PKCS7_INVALID_SIGNER_INFO
 
-pkcs7_get_signers_info_set error handling (6213931373035520)
-depends_on:MBEDTLS_RIPEMD160_C
-pkcs7_parse:"data_files/pkcs7_get_signers_info_set-missing_free-fuzz_pkcs7-6213931373035520.der":MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PKCS7_INVALID_CONTENT_INFO, MBEDTLS_ERR_ASN1_UNEXPECTED_TAG)
+PKCS7 Signed Data Parse Fail Corrupt signerInfos[2] (6213931373035520)
+depends_on:MBEDTLS_SHA256_C
+pkcs7_parse:"data_files/pkcs7_signerInfo_2_invalid_tag.der":MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PKCS7_INVALID_SIGNER_INFO,  MBEDTLS_ERR_ASN1_UNEXPECTED_TAG)
 
-pkcs7_get_signers_info_set error handling (4541044530479104)
-depends_on:MBEDTLS_RIPEMD160_C
-pkcs7_parse:"data_files/pkcs7_get_signers_info_set-leak-fuzz_pkcs7-4541044530479104.der": MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PKCS7_INVALID_CONTENT_INFO, MBEDTLS_ERR_ASN1_UNEXPECTED_TAG)
+PKCS7 Signed Data Parse Fail Corrupt signerInfos[1].issuerAndSerialNumber.serialNumber, after multi-element .name (4541044530479104)
+depends_on:MBEDTLS_SHA256_C
+pkcs7_parse:"data_files/pkcs7_signerInfo_1_serial_invalid_tag_after_long_name.der":MBEDTLS_ERR_PKCS7_INVALID_SIGNER_INFO
 
 PKCS7 Only Signed Data Parse Pass #15
 depends_on:MBEDTLS_SHA256_C:MBEDTLS_RSA_C