diff --git a/tests/utests/extensions/test_metadata.c b/tests/utests/extensions/test_metadata.c
index 8ebe67b..f41a51a 100644
--- a/tests/utests/extensions/test_metadata.c
+++ b/tests/utests/extensions/test_metadata.c
@@ -1,9 +1,9 @@
-/*
+/**
  * @file test_metadata.c
- * @author: Radek Krejci <rkrejci@cesnet.cz>
+ * @author Radek Krejci <rkrejci@cesnet.cz>
  * @brief unit tests for Metadata extension (annotation) support
  *
- * Copyright (c) 2019-2020 CESNET, z.s.p.o.
+ * Copyright (c) 2019 - 2022 CESNET, z.s.p.o.
  *
  * This source code is licensed under BSD 3-Clause License (the "License").
  * You may not use this file except in compliance with the License.
@@ -23,6 +23,7 @@
 {
     struct lys_module *mod;
     struct lysc_ext_instance *e;
+    const char *units;
 
     const char *data = "module a {yang-version 1.1; namespace urn:tests:extensions:metadata:a; prefix a;"
             "import ietf-yang-metadata {prefix md;}"
@@ -40,9 +41,10 @@
     UTEST_ADD_MODULE(data, LYS_IN_YANG, feats, &mod);
     assert_int_equal(1, LY_ARRAY_COUNT(mod->compiled->exts));
     e = &mod->compiled->exts[0];
-    assert_non_null(e->data);
+    assert_non_null(e->compiled);
     assert_non_null(e->substmts);
-    assert_string_equal("meters", *(const char **)e->substmts[ANNOTATION_SUBSTMT_UNITS].storage);
+    lyplg_ext_get_storage(e, LY_STMT_UNITS, (const void **)&units);
+    assert_string_equal("meters", units);
 
     /* invalid */
     /* missing mandatory type substatement */
@@ -50,43 +52,48 @@
             "import ietf-yang-metadata {prefix md;}"
             "md:annotation aa;}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Missing mandatory keyword \"type\" as a child of \"md:annotation aa\".", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Ext plugin \"ly2 metadata v1\": Missing mandatory keyword \"type\" as a child of \"md:annotation aa\".",
+            "/aa:{extension='md:annotation'}/aa");
 
     /* not allowed substatement */
     data = "module aa {yang-version 1.1; namespace urn:tests:extensions:metadata:aa; prefix aa;"
             "import ietf-yang-metadata {prefix md;}"
             "md:annotation aa {default x;}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Invalid keyword \"default\" as a child of \"md:annotation aa\" extension instance.", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Invalid keyword \"default\" as a child of \"md:annotation aa\" extension instance.",
+            "/aa:{extension='md:annotation'}/aa");
 
     /* invalid cardinality of units substatement */
     data = "module aa {yang-version 1.1; namespace urn:tests:extensions:metadata:aa; prefix aa;"
             "import ietf-yang-metadata {prefix md;}"
             "md:annotation aa {type string; units x; units y;}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Duplicate keyword \"units\".", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Duplicate keyword \"units\".",
+            "/aa:{extension='md:annotation'}/aa");
 
     /* invalid cardinality of status substatement */
     data = "module aa {yang-version 1.1; namespace urn:tests:extensions:metadata:aa; prefix aa;"
             "import ietf-yang-metadata {prefix md;}"
             "md:annotation aa {type string; status current; status obsolete;}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Duplicate keyword \"status\".", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Duplicate keyword \"status\".",
+            "/aa:{extension='md:annotation'}/aa");
 
     /* invalid cardinality of status substatement */
     data = "module aa {yang-version 1.1; namespace urn:tests:extensions:metadata:aa; prefix aa;"
             "import ietf-yang-metadata {prefix md;}"
             "md:annotation aa {type string; type uint8;}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Duplicate keyword \"type\".", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Duplicate keyword \"type\".",
+            "/aa:{extension='md:annotation'}/aa");
 
     /* duplication of the same annotation */
     data = "module aa {yang-version 1.1; namespace urn:tests:extensions:metadata:aa; prefix aa;"
             "import ietf-yang-metadata {prefix md;}"
             "md:annotation aa {type string;} md:annotation aa {type uint8;}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - metadata, version 1\": "
-            "Extension md:annotation is instantiated multiple times.", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Ext plugin \"ly2 metadata v1\": Extension md:annotation is instantiated multiple times.",
+            "/aa:{extension='md:annotation'}/aa");
 }
 
 static void
@@ -94,7 +101,7 @@
 {
     struct lys_module *mod;
     struct lysc_ext_instance *e;
-    const char *data;
+    const char *data, *units;
 
     data = "<module xmlns=\"urn:ietf:params:xml:ns:yang:yin:1\" xmlns:md=\"urn:ietf:params:xml:ns:yang:ietf-yang-metadata\" name=\"a\">\n"
             "<yang-version value=\"1.1\"/><namespace uri=\"urn:tests:extensions:metadata:a\"/><prefix value=\"a\"/>\n"
@@ -113,9 +120,10 @@
     UTEST_ADD_MODULE(data, LYS_IN_YIN, feats, &mod);
     assert_int_equal(1, LY_ARRAY_COUNT(mod->compiled->exts));
     e = &mod->compiled->exts[0];
-    assert_non_null(e->data);
+    assert_non_null(e->compiled);
     assert_non_null(e->substmts);
-    assert_string_equal("meters", *(const char **)e->substmts[ANNOTATION_SUBSTMT_UNITS].storage);
+    lyplg_ext_get_storage(e, LY_STMT_UNITS, (const void **)&units);
+    assert_string_equal("meters", units);
 
     /* invalid */
     /* missing mandatory type substatement */
@@ -125,7 +133,8 @@
             "<md:annotation name=\"aa\"/>\n"
             "</module>";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YIN, NULL));
-    CHECK_LOG_CTX("Missing mandatory keyword \"type\" as a child of \"md:annotation aa\".", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Ext plugin \"ly2 metadata v1\": Missing mandatory keyword \"type\" as a child of \"md:annotation aa\".",
+            "/aa:{extension='md:annotation'}/aa");
 
     /* not allowed substatement */
     data = "<module xmlns=\"urn:ietf:params:xml:ns:yang:yin:1\" xmlns:md=\"urn:ietf:params:xml:ns:yang:ietf-yang-metadata\" name=\"aa\">\n"
@@ -135,7 +144,8 @@
             "  <default value=\"x\"/>\n"
             "</md:annotation></module>";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YIN, NULL));
-    CHECK_LOG_CTX("Invalid keyword \"default\" as a child of \"md:annotation aa\" extension instance.", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Invalid keyword \"default\" as a child of \"md:annotation aa\" extension instance.",
+            "/aa:{extension='md:annotation'}/aa");
 
     /* invalid cardinality of units substatement */
     data = "<module xmlns=\"urn:ietf:params:xml:ns:yang:yin:1\" xmlns:md=\"urn:ietf:params:xml:ns:yang:ietf-yang-metadata\" name=\"aa\">\n"
@@ -147,7 +157,8 @@
             "  <units name=\"y\"/>\n"
             "</md:annotation></module>";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YIN, NULL));
-    CHECK_LOG_CTX("Duplicate keyword \"units\".", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Duplicate keyword \"units\".",
+            "/aa:{extension='md:annotation'}/aa");
 
     /* invalid cardinality of status substatement */
     data = "<module xmlns=\"urn:ietf:params:xml:ns:yang:yin:1\" xmlns:md=\"urn:ietf:params:xml:ns:yang:ietf-yang-metadata\" name=\"aa\">\n"
@@ -159,7 +170,8 @@
             "  <status value=\"obsolete\"/>\n"
             "</md:annotation></module>";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YIN, NULL));
-    CHECK_LOG_CTX("Duplicate keyword \"status\".", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Duplicate keyword \"status\".",
+            "/aa:{extension='md:annotation'}/aa");
 
     /* invalid cardinality of status substatement */
     data = "<module xmlns=\"urn:ietf:params:xml:ns:yang:yin:1\" xmlns:md=\"urn:ietf:params:xml:ns:yang:ietf-yang-metadata\" name=\"aa\">\n"
@@ -170,7 +182,8 @@
             "  <type name=\"uint8\"/>\n"
             "</md:annotation></module>";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YIN, NULL));
-    CHECK_LOG_CTX("Duplicate keyword \"type\".", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Duplicate keyword \"type\".",
+            "/aa:{extension='md:annotation'}/aa");
 
     /* duplication of the same annotation */
     data = "<module xmlns=\"urn:ietf:params:xml:ns:yang:yin:1\" xmlns:md=\"urn:ietf:params:xml:ns:yang:ietf-yang-metadata\" name=\"aa\">\n"
@@ -182,8 +195,8 @@
             "  <type name=\"uint8\"/>\n"
             "</md:annotation></module>";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YIN, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - metadata, version 1\": "
-            "Extension md:annotation is instantiated multiple times.", "/aa:{extension='md:annotation'}/aa");
+    CHECK_LOG_CTX("Ext plugin \"ly2 metadata v1\": Extension md:annotation is instantiated multiple times.",
+            "/aa:{extension='md:annotation'}/aa");
 }
 
 int
diff --git a/tests/utests/extensions/test_nacm.c b/tests/utests/extensions/test_nacm.c
index 2298dea..1c999fb 100644
--- a/tests/utests/extensions/test_nacm.c
+++ b/tests/utests/extensions/test_nacm.c
@@ -48,7 +48,7 @@
     assert_int_equal(LY_ARRAY_COUNT(cont->exts), 1);
     assert_int_equal(LY_ARRAY_COUNT(leaf->exts), 1); /* NACM extensions inherit */
     assert_ptr_equal(e->def, leaf->exts[0].def);
-    assert_int_equal(1, *((uint8_t *)e->data)); /* plugin's value for default-deny-all */
+    assert_int_equal(1, *((uint8_t *)e->compiled)); /* plugin's value for default-deny-all */
     assert_null(cont->next->exts);
 
     /* ignored - valid with warning */
@@ -56,7 +56,7 @@
             "import ietf-netconf-acm {revision-date 2018-02-14; prefix nacm;}"
             "nacm:default-deny-all;}";
     assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - NACM, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 NACM v1\": "
             "Extension nacm:default-deny-all is allowed only in a data nodes, but it is placed in \"module\" statement.",
             "/b:{extension='nacm:default-deny-all'}");
 
@@ -65,9 +65,9 @@
             "import ietf-netconf-acm {revision-date 2018-02-14; prefix nacm;}"
             "leaf l { type string; nacm:default-deny-all; nacm:default-deny-write;}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - NACM, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 NACM v1\": "
             "Extension nacm:default-deny-write is mixed with nacm:default-deny-all.",
-            "/aa:l/{extension='nacm:default-deny-write'}");
+            "/aa:l/{extension='nacm:default-deny-all'}");
 }
 
 static void
@@ -91,14 +91,14 @@
     assert_int_equal(LY_ARRAY_COUNT(cont->exts), 1);
     assert_int_equal(LY_ARRAY_COUNT(leaf->exts), 1); /* NACM extensions inherit */
     assert_ptr_equal(e->def, leaf->exts[0].def);
-    assert_int_equal(2, *((uint8_t *)e->data)); /* plugin's value for default-deny-write */
+    assert_int_equal(2, *((uint8_t *)e->compiled)); /* plugin's value for default-deny-write */
 
     /* ignored - valid with warning */
     data = "module b {yang-version 1.1; namespace urn:tests:extensions:nacm:b; prefix en;"
             "import ietf-netconf-acm {revision-date 2018-02-14; prefix nacm;}"
             "notification notif {nacm:default-deny-write;}}";
     assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - NACM, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 NACM v1\": "
             "Extension nacm:default-deny-write is not allowed in notification statement.",
             "/b:notif/{extension='nacm:default-deny-write'}");
 
@@ -107,7 +107,7 @@
             "import ietf-netconf-acm {revision-date 2018-02-14; prefix nacm;}"
             "leaf l { type string; nacm:default-deny-write; nacm:default-deny-write;}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - NACM, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 NACM v1\": "
             "Extension nacm:default-deny-write is instantiated multiple times.",
             "/aa:l/{extension='nacm:default-deny-write'}");
 }
diff --git a/tests/utests/extensions/test_schema_mount.c b/tests/utests/extensions/test_schema_mount.c
index b9b81c0..d97c777 100644
--- a/tests/utests/extensions/test_schema_mount.c
+++ b/tests/utests/extensions/test_schema_mount.c
@@ -73,7 +73,7 @@
             "  }\n"
             "}\n";
     assert_int_equal(LY_EINVAL, lys_parse_mem(UTEST_LYCTX, schema, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Extension \"yangmnt:mount-point\" instance not allowed in YANG version 1 module.",
             "/sm:root/{extension='yangmnt:mount-point'}/root");
 
@@ -90,7 +90,7 @@
             "  yangmnt:mount-point \"root\";\n"
             "}\n";
     assert_int_equal(LY_EINVAL, lys_parse_mem(UTEST_LYCTX, schema, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Extension \"yangmnt:mount-point\" instance allowed only in container or list statement.",
             "/sm:{extension='yangmnt:mount-point'}/root");
 
@@ -112,7 +112,7 @@
             "  }\n"
             "}\n";
     assert_int_equal(LY_EINVAL, lys_parse_mem(UTEST_LYCTX, schema, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Extension \"yangmnt:mount-point\" instance allowed only in container or list statement.",
             "/sm:root/l/{extension='yangmnt:mount-point'}/root");
 
@@ -136,9 +136,9 @@
             "  }\n"
             "}\n";
     assert_int_equal(LY_EINVAL, lys_parse_mem(UTEST_LYCTX, schema, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Multiple extension \"yangmnt:mount-point\" instances.",
-            "/sm:l/{extension='yangmnt:mount-point'}/root2");
+            "/sm:l/{extension='yangmnt:mount-point'}/root");
 
     /* valid */
     schema =
@@ -156,7 +156,7 @@
             "  }\n"
             "}\n";
     assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, schema, LYS_IN_YANG, &mod));
-    lys_print_mem(&str, mod, LYS_OUT_YIN, 0);
+    lys_print_mem(&str, mod, LYS_OUT_YANG, 0);
     assert_string_equal(str, schema);
     free(str);
 }
@@ -195,7 +195,7 @@
             "  </unknown>"
             "</root>";
     CHECK_PARSE_LYD_PARAM(xml, LYD_XML, 0, LYD_VALIDATE_PRESENT, LY_EINVAL, data);
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": Failed to get extension data, no callback set.",
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": Failed to get extension data, no callback set.",
             NULL);
 
     json =
@@ -212,7 +212,7 @@
             "  }"
             "}";
     CHECK_PARSE_LYD_PARAM(json, LYD_JSON, 0, LYD_VALIDATE_PRESENT, LY_EINVAL, data);
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": Failed to get extension data, no callback set.",
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": Failed to get extension data, no callback set.",
             NULL);
 
     /* unknown data */
@@ -338,9 +338,9 @@
             "  </mount-point>"
             "</schema-mounts>");
     CHECK_PARSE_LYD_PARAM(xml, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, LY_EVALID, data);
-    CHECK_LOG_CTX("Node \"interfaces\" not found as a child of \"root\" node.", "Line number 1.");
+    CHECK_LOG_CTX("Node \"interfaces\" not found as a child of \"root\" node.", NULL);
     CHECK_PARSE_LYD_PARAM(json, LYD_JSON, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, LY_EVALID, data);
-    CHECK_LOG_CTX("Node \"interfaces\" not found as a child of \"root\" node.", "Line number 1.");
+    CHECK_LOG_CTX("Node \"interfaces\" not found as a child of \"root\" node.", NULL);
 
     /* callback data correct, invalid YANG data */
     ly_ctx_set_ext_data_clb(UTEST_LYCTX, test_ext_data_clb,
@@ -404,25 +404,25 @@
             "  </mount-point>"
             "</schema-mounts>");
     CHECK_PARSE_LYD_PARAM(xml, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, LY_EVALID, data);
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Mandatory node \"type\" instance does not exist.",
             "Schema location \"/ietf-interfaces:interfaces/interface/type\".");
     CHECK_PARSE_LYD_PARAM(json, LYD_JSON, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, LY_EVALID, data);
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Mandatory node \"type\" instance does not exist.",
-            "Schema location \"/ietf-interfaces:interfaces/interface/type\", line number 1.");
+            "Schema location \"/ietf-interfaces:interfaces/interface/type\".");
 
     /* same validation fail in separate validation */
     CHECK_PARSE_LYD_PARAM(xml, LYD_XML, LYD_PARSE_STRICT | LYD_PARSE_ONLY, 0, LY_SUCCESS, data);
     assert_int_equal(LY_EVALID, lyd_validate_all(&data, NULL, LYD_VALIDATE_PRESENT, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Mandatory node \"type\" instance does not exist.",
             "Schema location \"/ietf-interfaces:interfaces/interface/type\".");
     lyd_free_siblings(data);
 
     CHECK_PARSE_LYD_PARAM(json, LYD_JSON, LYD_PARSE_STRICT | LYD_PARSE_ONLY, 0, LY_SUCCESS, data);
     assert_int_equal(LY_EVALID, lyd_validate_all(&data, NULL, LYD_VALIDATE_PRESENT, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Mandatory node \"type\" instance does not exist.",
             "Schema location \"/ietf-interfaces:interfaces/interface/type\".");
     lyd_free_siblings(data);
@@ -865,7 +865,7 @@
             "  </interfaces-state>\n"
             "</root2>\n";
     CHECK_PARSE_LYD_PARAM(xml, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, LY_EVALID, data);
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Shared-schema yang-library content-id \"2\" differs from \"1\" used previously.",
             "/ietf-yang-library:yang-library/content-id");
 
@@ -1121,7 +1121,7 @@
             "</root3>\n"
             "<target xmlns=\"urn:sm\">wrong-target-value</target>\n";
     CHECK_PARSE_LYD_PARAM(xml, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, LY_EVALID, data);
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Invalid leafref value \"target-value\" - no target instance \"/sm:target\" with the same value.",
             "Data location \"/ietf-interfaces:interfaces/interface[name='bu']/sm:sm-name\".");
 
@@ -1146,7 +1146,7 @@
             "  \"sm:target\": \"wrong-target-value\"\n"
             "}\n";
     CHECK_PARSE_LYD_PARAM(json, LYD_JSON, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, LY_EVALID, data);
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - Schema Mount, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 schema mount v1\": "
             "Invalid leafref value \"target-value\" - no target instance \"/sm:target\" with the same value.",
             "Data location \"/ietf-interfaces:interfaces/interface[name='bu']/sm:sm-name\", line number 18.");
 
diff --git a/tests/utests/extensions/test_structure.c b/tests/utests/extensions/test_structure.c
index 408d164..00e8677 100644
--- a/tests/utests/extensions/test_structure.c
+++ b/tests/utests/extensions/test_structure.c
@@ -34,14 +34,12 @@
             "  reference no-ref;"
             "  typedef my-type {type string;}"
             "  grouping my-grp {leaf gl {type my-type;}}"
-            "  grouping my-grp2 {leaf gl-obs {type uint16;}}"
             "  container n1 {leaf l {config false; type uint32;}}"
             "  list n2 {leaf l {type leafref {path /n1/l;}}}"
             "  uses my-grp;"
-            "  uses my-grp2 {status obsolete;}"
             "}}";
 
-    assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, &mod));
+    UTEST_ADD_MODULE(data, LYS_IN_YANG, NULL, &mod);
     assert_non_null(e = mod->compiled->exts);
     assert_int_equal(LY_ARRAY_COUNT(mod->compiled->exts), 1);
 
@@ -55,7 +53,7 @@
             "  leaf aug-leaf {type string;}"
             "}}";
 
-    assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, &mod));
+    UTEST_ADD_MODULE(data, LYS_IN_YANG, NULL, &mod);
     assert_non_null(e = mod->compiled->exts);
     assert_int_equal(LY_ARRAY_COUNT(mod->compiled->exts), 1);
 
@@ -100,10 +98,6 @@
             "      type string;\n"
             "      status deprecated;\n"
             "    }\n"
-            "    leaf gl-obs {\n"
-            "      type uint16;\n"
-            "      status obsolete;\n"
-            "    }\n"
             "  }\n"
             "}\n";
 
@@ -138,7 +132,8 @@
             "\n"
             "  ietf-yang-structure-ext:structure \"struct\";\n"
             "}\n";
-    assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, &mod));
+
+    UTEST_ADD_MODULE(data, LYS_IN_YANG, NULL, &mod);
     assert_non_null(e = mod->compiled->exts);
     assert_int_equal(LY_ARRAY_COUNT(mod->compiled->exts), 1);
     assert_int_equal(LY_SUCCESS, lys_print_mem(&printed, mod, LYS_OUT_YANG_COMPILED, 0));
@@ -154,41 +149,39 @@
     data = "module a {yang-version 1.1; namespace urn:tests:extensions:structure:a; prefix self;"
             "import ietf-yang-structure-ext {prefix sx;}"
             "sx:structure struct {import yang;}}";
-    assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
+    UTEST_INVALID_MODULE(data, LYS_IN_YANG, NULL, LY_EVALID);
     CHECK_LOG_CTX("Invalid keyword \"import\" as a child of \"sx:structure struct\" extension instance.",
             "/a:{extension='sx:structure'}/struct");
 
     data = "module a {yang-version 1.1; namespace urn:tests:extensions:structure:a; prefix self;"
             "import ietf-yang-structure-ext {prefix sx;}"
             "container b { sx:structure struct { container x { leaf x {type string;}}}}}";
-    assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - structure, version 1\": "
+    UTEST_INVALID_MODULE(data, LYS_IN_YANG, NULL, LY_EVALID);
+    CHECK_LOG_CTX("Ext plugin \"ly2 structure v1\": "
             "Extension sx:structure must not be used as a non top-level statement in \"container\" statement.",
             "/a:b/{extension='sx:structure'}/struct");
 
     data = "module a {yang-version 1.1; namespace urn:tests:extensions:structure:a; prefix self;"
             "import ietf-yang-structure-ext {prefix sx;}"
             "sx:structure { container x { leaf x {type string;}}}}";
-    assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension instance \"sx:structure\" misses argument element \"name\".",
-            "/a:{extension='sx:structure'}");
+    UTEST_INVALID_MODULE(data, LYS_IN_YANG, NULL, LY_EVALID);
+    CHECK_LOG_CTX("Parsing module \"a\" failed.", NULL,
+            "Extension instance \"sx:structure\" missing argument element \"name\".", NULL);
 
     data = "module a {yang-version 1.1; namespace urn:tests:extensions:structure:a; prefix self;"
             "import ietf-yang-structure-ext {prefix sx;}"
             "sx:structure struct { container x { leaf x {type string;}}}"
             "sx:structure struct { container y { leaf y {type string;}}}}";
-    assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - structure, version 1\": "
-            "Extension sx:structure is instantiated multiple times.",
+    UTEST_INVALID_MODULE(data, LYS_IN_YANG, NULL, LY_EVALID);
+    CHECK_LOG_CTX("Ext plugin \"ly2 structure v1\": Extension sx:structure is instantiated multiple times.",
             "/a:{extension='sx:structure'}/struct");
 
     data = "module a {yang-version 1.1; namespace urn:tests:extensions:structure:a; prefix self;"
             "import ietf-yang-structure-ext {prefix sx;}"
             "sx:structure struct { container x { leaf x {type string;}}}"
             "choice struct { container y { leaf y {type string;}}}}";
-    assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - structure, version 1\": "
-            "Extension sx:structure collides with a choice with the same identifier.",
+    UTEST_INVALID_MODULE(data, LYS_IN_YANG, NULL, LY_EVALID);
+    CHECK_LOG_CTX("Ext plugin \"ly2 structure v1\": Extension sx:structure collides with a choice with the same identifier.",
             "/a:{extension='sx:structure'}/struct");
 }
 
@@ -204,7 +197,7 @@
     const char *xml = "<x xmlns=\"urn:tests:extensions:structure:a\"><x>test</x></x>";
     const char *json = "{\"a:x\":{\"x\":\"test\"}}";
 
-    assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, schema, LYS_IN_YANG, &mod));
+    UTEST_ADD_MODULE(schema, LYS_IN_YANG, NULL, &mod);
     assert_non_null(e = mod->compiled->exts);
 
     assert_int_equal(LY_SUCCESS, ly_in_new_memory(xml, &UTEST_IN));
diff --git a/tests/utests/extensions/test_yangdata.c b/tests/utests/extensions/test_yangdata.c
index e7e7bc1..8c0176f 100644
--- a/tests/utests/extensions/test_yangdata.c
+++ b/tests/utests/extensions/test_yangdata.c
@@ -117,7 +117,7 @@
             "}\n";
     assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, &mod));
     assert_null(mod->compiled->exts);
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - yang-data, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 yang-data v1\": "
             "Extension rc:yang-data is ignored since it appears as a non top-level statement in \"container\" statement.",
             "/b:b/{extension='rc:yang-data'}/template");
     assert_int_equal(LY_SUCCESS, lys_print_mem(&printed, mod, LYS_OUT_YANG_COMPILED, 0));
@@ -174,7 +174,7 @@
             "import ietf-restconf {revision-date 2017-01-26; prefix rc;}"
             "rc:yang-data template { choice x { leaf x {type string;}}}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - yang-data, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 yang-data v1\": "
             "Extension rc:yang-data is instantiated with leaf top level data node (inside a choice), "
             "but only a single container data node is allowed.",
             "/a:{extension='rc:yang-data'}/template");
@@ -183,7 +183,7 @@
             "import ietf-restconf {revision-date 2017-01-26; prefix rc;}"
             "rc:yang-data template { choice x { case x { container z {presence ppp;} leaf x {type string;}}}}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - yang-data, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 yang-data v1\": "
             "Extension rc:yang-data is instantiated with multiple top level data nodes (inside a single choice's case), "
             "but only a single container data node is allowed.",
             "/a:{extension='rc:yang-data'}/template");
@@ -192,7 +192,7 @@
             "import ietf-restconf {revision-date 2017-01-26; prefix rc;}"
             "rc:yang-data template { container x { leaf x {type string;}} container y { leaf y {type string;}}}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - yang-data, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 yang-data v1\": "
             "Extension rc:yang-data is instantiated with multiple top level data nodes, "
             "but only a single container data node is allowed.",
             "/a:{extension='rc:yang-data'}/template");
@@ -201,7 +201,7 @@
             "import ietf-restconf {revision-date 2017-01-26; prefix rc;}"
             "rc:yang-data template;}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - yang-data, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 yang-data v1\": "
             "Extension rc:yang-data is instantiated without any top level data node, "
             "but exactly one container data node is expected.",
             "/a:{extension='rc:yang-data'}/template");
@@ -210,15 +210,15 @@
             "import ietf-restconf {revision-date 2017-01-26; prefix rc;}"
             "rc:yang-data { container x { leaf x {type string;}}}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension instance \"rc:yang-data\" misses argument element \"name\".",
-            "/a:{extension='rc:yang-data'}");
+    CHECK_LOG_CTX("Parsing module \"a\" failed.", NULL,
+            "Extension instance \"rc:yang-data\" missing argument element \"name\".", NULL);
 
     data = "module a {yang-version 1.1; namespace urn:tests:extensions:yangdata:a; prefix self;"
             "import ietf-restconf {revision-date 2017-01-26; prefix rc;}"
             "rc:yang-data template { container x { leaf x {type string;}}}"
             "rc:yang-data template { container y { leaf y {type string;}}}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - yang-data, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 yang-data v1\": "
             "Extension rc:yang-data is instantiated multiple times.",
             "/a:{extension='rc:yang-data'}/template");
 
@@ -227,7 +227,7 @@
             "grouping t { leaf-list x {type string;}}"
             "rc:yang-data template { uses t;}}";
     assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, data, LYS_IN_YANG, NULL));
-    CHECK_LOG_CTX("Extension plugin \"libyang 2 - yang-data, version 1\": "
+    CHECK_LOG_CTX("Ext plugin \"ly2 yang-data v1\": "
             "Extension rc:yang-data is instantiated with leaf-list top level data node, "
             "but only a single container data node is allowed.",
             "/a:{extension='rc:yang-data'}/template");