diff --git a/lib/clixon/clixon_yang.h b/lib/clixon/clixon_yang.h
index 5ea5b340..b21dc430 100644
--- a/lib/clixon/clixon_yang.h
+++ b/lib/clixon/clixon_yang.h
@@ -94,7 +94,10 @@
                                       * augment/grouping */
 #define YANG_FLAG_MYMODULE     0x800 /* Use external map to access my-module for
                                       * UNKNOWNS and augment/grouping */
-#define YANG_FLAG_NOORIG      0x1000 /* Node different from orig, do not use orig-link */
+#define YANG_FLAG_REFINE      0x1000 /* In derived trees from grouping and augments, this node
+                                      * may be different from orig, therefore do not use link to
+                                      * original. May also be due to deviations of derived trees
+                                      */
 
 /*
  * Types
diff --git a/lib/src/clixon_yang.c b/lib/src/clixon_yang.c
index f2875739..affd9068 100644
--- a/lib/src/clixon_yang.c
+++ b/lib/src/clixon_yang.c
@@ -2416,6 +2416,8 @@ yang_deviation(yang_stmt *ys,
                 /* Make a copy of deviate child and insert. */
                 if ((yc1 = ys_dup(yc)) == NULL)
                     goto done;
+                if (yang_apply(yc1, -1, (yang_applyfn_t*)yang_flag_set, -1, (void*)YANG_FLAG_REFINE) < 0)
+                    goto done;
                 if (yn_insert(ytarget, yc1) < 0)
                     goto done;
             }
@@ -2449,7 +2451,8 @@ yang_deviation(yang_stmt *ys,
                 /* Make a copy of deviate child and insert. */
                 if ((yc1 = ys_dup(yc)) == NULL)
                     goto done;
-                yang_flag_set(yc1, YANG_FLAG_NOORIG);
+                if (yang_apply(yc1, -1, (yang_applyfn_t*)yang_flag_set, -1, (void*)YANG_FLAG_REFINE) < 0)
+                    goto done;
                 if (yn_insert(ytarget, yc1) < 0)
                     goto done;
             }
diff --git a/lib/src/clixon_yang_type.c b/lib/src/clixon_yang_type.c
index f8cedd21..22b6c62d 100644
--- a/lib/src/clixon_yang_type.c
+++ b/lib/src/clixon_yang_type.c
@@ -1486,7 +1486,7 @@ yang_type_get(yang_stmt    *ys,
         clixon_err(OE_DB, ENOENT, "mandatory type object is not found");
         goto done;
     }
-    if ((yorig = yang_orig_get(ys)) != NULL && yang_flag_get(ytype, YANG_FLAG_NOORIG) == 0){
+    if ((yorig = yang_orig_get(ys)) != NULL && yang_flag_get(ytype, YANG_FLAG_REFINE) == 0){
         ys = yorig;
         if ((ytype = yang_find(ys, Y_TYPE, NULL)) == NULL){
             clixon_err(OE_DB, ENOENT, "mandatory type object is not found");
diff --git a/test/test_openconfig.sh b/test/test_openconfig.sh
index 90ec0e92..1c6911a8 100755
--- a/test/test_openconfig.sh
+++ b/test/test_openconfig.sh
@@ -81,56 +81,6 @@ EOF
     fi
 done
 
-# The following test is a special case: A deviation of a grouped type did not appear in
-# type resolution
-f=$dir/my.yang
-cat <<EOF > $f
-module my {
-   namespace "urn:example:clixon";
-   prefix "ex";
-
-   import "openconfig-network-instance" {
-      prefix "oc-netinst";
-   }
-   deviation "/oc-netinst:network-instances/oc-netinst:network-instance/oc-netinst:protocols/oc-netinst:protocol/oc-netinst:isis/oc-netinst:interfaces/oc-netinst:interface/oc-netinst:levels/oc-netinst:level/oc-netinst:afi-safi/oc-netinst:af/oc-netinst:config/oc-netinst:metric" {
-      description "metric range is restricted";
-      deviate "replace" {
-         type "union" {
-            type "uint32";
-            type "enumeration" {
-               enum "MYTEXT";
-            }
-         }
-         default "MYTEXT";
-      }
-   }
-}
-EOF
-
-modname=$(basename $f | awk -F "." '{print $1}')
-# Generate autocli for these modules
-AUTOCLI=$(autocli_config openconfig-* kw-nokey false)
-
-cat <<EOF > $cfg
-<clixon-config xmlns="http://clicon.org/config">
-   <CLICON_CONFIGFILE>$cfg</CLICON_CONFIGFILE>
-   <CLICON_FEATURE>ietf-netconf:startup</CLICON_FEATURE>
-   <CLICON_YANG_DIR>${OPENCONFIG}</CLICON_YANG_DIR>
-   <CLICON_YANG_DIR>${YANG_INSTALLDIR}</CLICON_YANG_DIR>
-   <CLICON_YANG_AUGMENT_ACCEPT_BROKEN>true</CLICON_YANG_AUGMENT_ACCEPT_BROKEN>
-   <CLICON_CLISPEC_DIR>/usr/local/lib/$APPNAME/clispec</CLICON_CLISPEC_DIR>
-   <CLICON_CLI_DIR>/usr/local/lib/$APPNAME/cli</CLICON_CLI_DIR>
-   <CLICON_CLI_MODE>$APPNAME</CLICON_CLI_MODE>
-   <CLICON_SOCK>/usr/local/var/run/$APPNAME.sock</CLICON_SOCK>
-   <CLICON_BACKEND_PIDFILE>/usr/local/var/run/$APPNAME.pidfile</CLICON_BACKEND_PIDFILE>
-   <CLICON_XMLDB_DIR>$dir</CLICON_XMLDB_DIR>
-   ${AUTOCLI}
-</clixon-config>
-EOF
-
-new "deviation: $clixon_cli -D $DBG  -1f $cfg  -y $f show version"
-expectpart "$($clixon_cli -D $DBG -1f $cfg -y $f show version)" 0 "${CLIXON_VERSION}"
-
 rm -rf $dir
 
 new "endtest"
diff --git a/test/test_yang_deviation.sh b/test/test_yang_deviation.sh
index de4586fa..84aad67f 100755
--- a/test/test_yang_deviation.sh
+++ b/test/test_yang_deviation.sh
@@ -32,38 +32,42 @@ EOF
 
 cat <<EOF > $fyangbase
 module example-base{
-   yang-version 1.1;
-   prefix base;
-   namespace "urn:example:base";
-   grouping system-top {
-     container system {
-      must "daytime or time"; /* deviate delete removes this */
-      leaf daytime{           /* deviate not-supported removes this */
-         type string;
-      }
-      leaf time{            
-         type string;
-      }
-      list name-server {
-         max-elements 1;      /* deviate replace replaces to "max.elements 3" here */
-         key name;
-         leaf name {
-            type string;
-         } 
-      }
-      list user {
-         key name;
-         leaf name {
-            type string;
-         } 
-         leaf type {
-            type string;
-            /* deviate add adds "default admin" here */
-         } 
-      }
-     }
-   }
-   uses system-top;
+    yang-version 1.1;
+    prefix base;
+    namespace "urn:example:base";
+    grouping system-top {
+        container system {
+            must "daytime or time"; /* deviate delete removes this */
+            leaf daytime{           /* deviate not-supported removes this */
+                type string;
+            }
+            leaf time{
+                type string;
+            }
+            list name-server {
+                max-elements 1;      /* deviate replace replaces to "max.elements 3" here */
+                key name;
+                leaf name {
+                    type string;
+                }
+            }
+            list user {
+                key name;
+                leaf name {
+                    type string;
+                }
+                leaf type {
+                    type string;
+                    /* deviate add adds "default admin" here */
+                }
+            }
+            leaf my {
+                /* deviate replaces with int and default -42 */
+                type uint16;
+            }
+        }
+    }
+    uses system-top;
 }
 EOF
 
@@ -242,6 +246,69 @@ EOF
 new "5. deviate delete"
 testrun true false false true
 
+# Replace example from RFC 7950 Sec 7.20.3.3
+cat <<EOF > $fyangdev
+module example-deviations{
+   yang-version 1.1;
+   prefix md;
+   namespace "urn:example:deviations";
+   import example-base {
+         prefix base;
+   }
+   deviation /base:system/base:my {
+      deviate replace {
+         type int8;
+      }
+   }
+   deviation /base:system/base:my {
+      deviate add {
+         default -42;
+      }
+   }
+}
+EOF
+
+new "6. deviate replace default"
+
+if [ "$BE" -ne 0 ]; then
+    new "kill old backend"
+    sudo clixon_backend -zf "$cfg"
+    if [ $? -ne 0 ]; then
+        err
+    fi
+    new "start backend -s init -f $cfg"
+    start_backend -s init -f "$cfg"
+fi
+
+new "wait backend"
+wait_backend
+
+new "show default value, expect deviated"
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" "<rpc $DEFAULTNS><get-config><with-defaults xmlns=\"urn:ietf:params:xml:ns:yang:ietf-netconf-with-defaults\">report-all</with-defaults><source><running/></source><filter type=\"xpath\" select=\"/base:system/base:my\" xmlns:base=\"urn:example:base\"/></get-config></rpc>" "" "<rpc-reply $DEFAULTNS><data><system xmlns=\"urn:example:base\"><my>-42</my></system></data></rpc-reply>"
+
+new "set negative value"
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" "<rpc $DEFAULTNS><edit-config><target><candidate/></target><config><system xmlns=\"urn:example:base\"><daytime>Sept17</daytime><my>-77</my></system></config></edit-config></rpc>" "" "<rpc-reply $DEFAULTNS><ok/></rpc-reply>"
+
+new "netconf validate ok"
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" "<rpc $DEFAULTNS><validate><source><candidate/></source></validate></rpc>" "" "<rpc-reply $DEFAULTNS><ok/></rpc-reply>"
+
+new "set large value"
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" "<rpc $DEFAULTNS><edit-config><target><candidate/></target><config><system xmlns=\"urn:example:base\"><my>98735</my></system></config></edit-config></rpc>" "" "<rpc-reply $DEFAULTNS><ok/></rpc-reply>"
+
+new "netconf validate expect fail"
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" "<rpc $DEFAULTNS><validate><source><candidate/></source></validate></rpc>" "" "<rpc-reply $DEFAULTNS><rpc-error><error-type>application</error-type><error-tag>bad-element</error-tag><error-info><bad-element>my</bad-element></error-info><error-severity>error</error-severity><error-message>Number 98735 out of range: -128 - 127</error-message></rpc-error></rpc-reply>"
+
+if [ "$BE" -ne 0 ]; then
+    new "Kill backend"
+    # Check if premature kill
+    pid=$(pgrep -u root -f clixon_backend)
+    if [ -z "$pid" ]; then
+        err "backend already dead"
+    fi
+    # kill backend
+    stop_backend -f "$cfg"
+fi
+
 rm -rf "$dir"
 
 new "endtest"