diff --git a/tests/kdc/check-pkinit.in b/tests/kdc/check-pkinit.in
index d884ac740..287cf93b0 100644
--- a/tests/kdc/check-pkinit.in
+++ b/tests/kdc/check-pkinit.in
@@ -130,7 +130,7 @@ ${hxtool} issue-certificate \
 	  --ca-certificate=FILE:$objdir/ca.crt,${keyfile} \
 	  --type="pkinit-kdc" \
           --pk-init-principal="krbtgt/TEST.H5L.SE@TEST.H5L.SE" \
-	  --req="req-kdc.der" \
+	  --req="PKCS10:req-kdc.der" \
 	  --certificate="FILE:kdc.crt" || exit 1
 
 echo "issue user certificate (pkinit san)"
@@ -138,14 +138,14 @@ ${hxtool} issue-certificate \
 	  --ca-certificate=FILE:$objdir/ca.crt,${keyfile} \
 	  --type="pkinit-client" \
           --pk-init-principal="bar@TEST.H5L.SE" \
-	  --req="req-pkinit.der" \
+	  --req="PKCS10:req-pkinit.der" \
 	  --certificate="FILE:pkinit.crt" || exit 1
 
 echo "issue user 2 certificate (no san)"
 ${hxtool} issue-certificate \
 	  --ca-certificate=FILE:$objdir/ca.crt,${keyfile} \
 	  --type="pkinit-client" \
-	  --req="req-pkinit2.der" \
+	  --req="PKCS10:req-pkinit2.der" \
 	  --certificate="FILE:pkinit2.crt" || exit 1
 
 echo "issue user 3 certificate (ms san)"
@@ -153,7 +153,7 @@ ${hxtool} issue-certificate \
 	  --ca-certificate=FILE:$objdir/ca.crt,${keyfile} \
 	  --type="pkinit-client" \
           --ms-upn="bar@test.h5l.se" \
-	  --req="req-pkinit2.der" \
+	  --req="PKCS10:req-pkinit2.der" \
 	  --certificate="FILE:pkinit3.crt" || exit 1