diff --git a/conformance_test/core_language_tests/negative_tests/05_basic_language_elements.script b/conformance_test/core_language_tests/negative_tests/05_basic_language_elements.script
index b2ed01feff3c4d358c937b77e3624ad64ab53a1a..795212f1d559955c92d22e42b62e89506194bb4e 100644
--- a/conformance_test/core_language_tests/negative_tests/05_basic_language_elements.script
+++ b/conformance_test/core_language_tests/negative_tests/05_basic_language_elements.script
@@ -2057,7 +2057,11 @@ module NegSyn_05040101_parameters_of_kind_value_009 {
 <END_MODULE>
 
 <RESULT COUNT 1>
-error: at or before token `map': syntax error, unexpected MapKeyword, expecting InOutParKeyword or InParKeyword or OutParKeyword or '\}'
+error: at or before token `map': syntax error, unexpected MapKeyword
+<END_RESULT>
+
+<RESULT COUNT 1>
+error: at or before token `\(': syntax error, unexpected '\(', expecting MessageKeyword or MixedKeyword or ProcedureKeyword
 <END_RESULT>
 
 <END_TC>
diff --git a/conformance_test/core_language_tests/negative_tests/06_types_and_values.script b/conformance_test/core_language_tests/negative_tests/06_types_and_values.script
index 53a4b2712c4a90e599300b1fcc9cab672f599e0f..eb0db169efb9f62cfb5ab517fbb0403029cee951 100644
--- a/conformance_test/core_language_tests/negative_tests/06_types_and_values.script
+++ b/conformance_test/core_language_tests/negative_tests/06_types_and_values.script
@@ -6964,7 +6964,7 @@ module NegSem_060209_CommunicationPortTypes_004 {
 <END_MODULE>
 
 <RESULT COUNT 1>
-error: at or before token `\}': syntax error, unexpected '\}', expecting InOutParKeyword or InParKeyword or OutParKeyword
+error: at or before token `\}': syntax error, unexpected '\}'
 <END_RESULT>
 
 <END_TC>
@@ -7017,7 +7017,7 @@ module NegSem_060209_CommunicationPortTypes_005 {
 <END_MODULE>
 
 <RESULT COUNT 1>
-error: at or before token `\}': syntax error, unexpected '\}', expecting InOutParKeyword or InParKeyword or OutParKeyword
+error: at or before token `\}': syntax error, unexpected '\}'
 <END_RESULT>
 
 <END_TC>
diff --git a/conformance_test/core_language_tests/negative_tests/07-14_folder.script b/conformance_test/core_language_tests/negative_tests/07-14_folder.script
index 9a80171cff8055dfdac0e38496ff3669b86b5c49..80f0b4b8f57d83343220044272c1031cc24091c3 100644
--- a/conformance_test/core_language_tests/negative_tests/07-14_folder.script
+++ b/conformance_test/core_language_tests/negative_tests/07-14_folder.script
@@ -2286,7 +2286,7 @@ module NegSem_1101_ValueVars_001 {
 <END_MODULE>
 
 <RESULT COUNT 1>
-error: integer value was expected
+error: any value is not allowed in this context
 <END_RESULT>
 
 <END_TC>
diff --git a/conformance_test/core_language_tests/negative_tests/15_templates.script b/conformance_test/core_language_tests/negative_tests/15_templates.script
index 541ed90f724e5d226f94b3a6def421846ef9e813..195cea34b2d8f38fd8ea2e2ed058e266ce77d7bd 100644
--- a/conformance_test/core_language_tests/negative_tests/15_templates.script
+++ b/conformance_test/core_language_tests/negative_tests/15_templates.script
@@ -4580,7 +4580,7 @@ module NegSem_1511_ConcatenatingTemplatesOfStringAndListTypes_004 {
 <END_MODULE>
 
 <RESULT COUNT 1>
-error: Operands of charstring template concatenation must be specific value templates
+error: any or omit is not allowed in charstring template concatenation
 <END_RESULT>
 
 <END_TC>
diff --git a/conformance_test/core_language_tests/negative_tests/16-20_folders.script b/conformance_test/core_language_tests/negative_tests/16-20_folders.script
index 0589099a88cc8c145fbf92e67c8fa803c8160bce..df20a877a0b40c816dd88c8d7d23dab728feaf55 100644
--- a/conformance_test/core_language_tests/negative_tests/16-20_folders.script
+++ b/conformance_test/core_language_tests/negative_tests/16-20_folders.script
@@ -2399,14 +2399,14 @@ error: `omit' value is not allowed in this context
 .*---------------------------------------------------------------------*
 :xmp tab=0.
 
-<TC - 1901_001 Ensure that the IUT properly evaluates assignment statements  >
+<TC - 1901_001 Ensure that the IUT properly evaluates assignment statements syntaxis >
 
 <COMPILE>
 
 <MODULE TTCN NegSyn_1901_assignments_001 NegSyn_1901_assignments_001.ttcn >
 /***************************************************
  ** @version  0.0.1
- ** @purpose  1:19.1, Ensure that the IUT properly evaluates assignment statements
+ ** @purpose  1:19.1, Ensure that the IUT properly evaluates assignment statements syntaxis
  ** @verdict  pass  reject
  ***************************************************/
 module NegSyn_1901_assignments_001 {
@@ -2434,7 +2434,7 @@ module NegSyn_1901_assignments_001 {
 <END_MODULE>
 
 <RESULT COUNT 1>
-error: at or before token `:=': syntax error, unexpected :=, expecting ','
+error: at or before token `:=': syntax error, unexpected :=, expecting '\)' or ','
 <END_RESULT>
 
 <END_TC>