diff --git a/tests/create_ecc.sh b/tests/create_ecc.sh
index bbb3014..5b387d8 100755
--- a/tests/create_ecc.sh
+++ b/tests/create_ecc.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-
+. ../test-common.sh
 
 ##
 # test is
@@ -7,7 +7,7 @@
 # 2. Create a self signed x509 certificate
 # 3. verify the certificate
 for curve in $(${bindir}/create_tpm2_key --list-curves); do
-    if openssl ecparam -name ${curve} 2>&1 | egrep '(invalid|unknown) curve'; then
+    if check_curve ${curve}; then
 	continue
     fi
     echo "Checking curve ${curve}"
diff --git a/tests/derive_ecc.sh b/tests/derive_ecc.sh
index 69ec381..c53adde 100755
--- a/tests/derive_ecc.sh
+++ b/tests/derive_ecc.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-
+. ../test-common.sh
 
 ##
 # test is to check that the key derivation works
@@ -23,7 +23,7 @@
 ##
 
 for curve in $(${bindir}/create_tpm2_key --list-curves); do
-    if openssl ecparam -name ${curve} 2>&1 | egrep '(invalid|unknown) curve'; then
+    if check_curve ${curve}; then
 	continue
     fi
     echo "Checking curve ${curve} explicitly named"
diff --git a/tests/test-common.sh b/tests/test-common.sh
new file mode 100644
index 0000000..22c9e13
--- /dev/null
+++ b/tests/test-common.sh
@@ -0,0 +1,19 @@
+##
+# common routines to be included
+##
+
+##
+# check curve, returns 0 (success) for invalid curve so
+#   if check_curve; then continue works
+##
+check_curve() {
+    ##
+    # if openssl supports sm2, it only allows sm3 as the hash, which
+    # doesn't work with our generic tests, so skip it
+    ##
+    [ "${curve}" = "sm2" ] && return 0
+
+    name=$(openssl ecparam -name $1 2>&1) || return 0
+    echo $name|egrep '(invalid|unknown) curve' && return 0
+    return 1
+}
diff --git a/tests/wrap_ecc.sh b/tests/wrap_ecc.sh
index 63fa445..ff6d087 100755
--- a/tests/wrap_ecc.sh
+++ b/tests/wrap_ecc.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-
+. ../test-common.sh
 
 ##
 # test is
@@ -8,7 +8,7 @@
 # 3. Create a self signed x509 certificate
 # 4. verify the certificate
 for curve in $(${bindir}/create_tpm2_key --list-curves); do
-    if openssl ecparam -name ${curve} 2>&1 | egrep '(unknown|invalid) curve'; then
+    if check_curve ${curve}; then
 	continue
     fi
     echo "Checking curve ${curve}"
@@ -20,7 +20,7 @@
     exit 1
 done
 for curve in $(${bindir}/create_tpm2_key --list-curves); do
-    if openssl ecparam -name ${curve} 2>&1 | egrep '(invalid|unknown) curve'; then
+    if check_curve ${curve}; then
 	continue
     fi
     echo "Checking curve ${curve}"
diff --git a/tests/wrap_generic_ecc.sh b/tests/wrap_generic_ecc.sh
index 4cc0172..e3fadf5 100755
--- a/tests/wrap_generic_ecc.sh
+++ b/tests/wrap_generic_ecc.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-
+. ../test-common.sh
 
 ##
 # test is
@@ -8,7 +8,7 @@
 # 3. Create a self signed x509 certificate
 # 4. verify the certificate
 for curve in $(${bindir}/create_tpm2_key --list-curves); do
-    if openssl ecparam -name ${curve} 2>&1 | egrep '(invalid|unknown) curve'; then
+    if check_curve ${curve}; then
 	continue
     fi
     openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:${curve} -out key.priv && \