diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index 70e5770..40dec4c 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -129,7 +129,7 @@
 	EX_NEEDARG|EX_EXTRA|EX_NOTRLCOM,
 	ADDR_NONE),
 EXCMD(CMD_abstract,	"abstract",	ex_class,
-	EX_EXTRA|EX_TRLBAR|EX_CMDWIN|EX_LOCK_OK|EX_EXPORT,
+	EX_EXTRA|EX_CMDWIN|EX_LOCK_OK|EX_EXPORT,
 	ADDR_NONE),
 EXCMD(CMD_all,		"all",		ex_all,
 	EX_BANG|EX_RANGE|EX_COUNT|EX_TRLBAR,
@@ -357,7 +357,7 @@
 	EX_RANGE|EX_COUNT|EX_TRLBAR|EX_BANG,
 	ADDR_UNSIGNED),
 EXCMD(CMD_class,	"class",	ex_class,
-	EX_EXTRA|EX_TRLBAR|EX_CMDWIN|EX_LOCK_OK|EX_EXPORT,
+	EX_EXTRA|EX_CMDWIN|EX_LOCK_OK|EX_EXPORT,
 	ADDR_NONE),
 EXCMD(CMD_close,	"close",	ex_close,
 	EX_BANG|EX_RANGE|EX_COUNT|EX_TRLBAR|EX_CMDWIN|EX_LOCK_OK,
@@ -597,7 +597,7 @@
 	EX_BANG|EX_TRLBAR,
 	ADDR_NONE),
 EXCMD(CMD_enum,		"enum",		ex_class,
-	EX_EXTRA|EX_TRLBAR|EX_CMDWIN|EX_LOCK_OK|EX_EXPORT,
+	EX_EXTRA|EX_CMDWIN|EX_LOCK_OK|EX_EXPORT,
 	ADDR_NONE),
 EXCMD(CMD_eval,		"eval",		ex_eval,
 	EX_EXTRA|EX_NOTRLCOM|EX_EXPR_ARG|EX_SBOXOK|EX_CMDWIN|EX_LOCK_OK,
@@ -759,7 +759,7 @@
 	EX_TRLBAR|EX_CMDWIN|EX_LOCK_OK,
 	ADDR_NONE),
 EXCMD(CMD_interface,	"interface",	ex_class,
-	EX_EXTRA|EX_TRLBAR|EX_CMDWIN|EX_LOCK_OK|EX_EXPORT,
+	EX_EXTRA|EX_CMDWIN|EX_LOCK_OK|EX_EXPORT,
 	ADDR_NONE),
 EXCMD(CMD_isearch,	"isearch",	ex_findpat,
 	EX_BANG|EX_RANGE|EX_DFLALL|EX_WHOLEFOLD|EX_EXTRA|EX_CMDWIN|EX_LOCK_OK,
diff --git a/src/testdir/test_vim9_class.vim b/src/testdir/test_vim9_class.vim
index 5957f57..bd06c6e 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -67,6 +67,42 @@
   END
   v9.CheckSourceFailure(lines, "E488: Trailing characters: | echo 'done'", 3)
 
+  # Additional command after "class name"
+  lines =<< trim END
+    vim9script
+    class Something | var x = 10
+    endclass
+  END
+  v9.CheckSourceFailure(lines, "E488: Trailing characters: | var x = 10", 2)
+
+  # Additional command after "object variable"
+  lines =<< trim END
+    vim9script
+    class Something
+      var l: list<number> = [] | var y = 10
+    endclass
+  END
+  v9.CheckSourceFailure(lines, "E488: Trailing characters: | var y = 10", 3)
+
+  # Additional command after "class variable"
+  lines =<< trim END
+    vim9script
+    class Something
+      static var d = {a: 10} | var y = 10
+    endclass
+  END
+  v9.CheckSourceFailure(lines, "E488: Trailing characters: | var y = 10", 3)
+
+  # Additional command after "object method"
+  lines =<< trim END
+    vim9script
+    class Something
+      def Foo() | var y = 10
+      enddef
+    endclass
+  END
+  v9.CheckSourceFailure(lines, "E488: Trailing characters: | var y = 10", 3)
+
   # Try to define a class with the same name as an existing variable
   lines =<< trim END
     vim9script
@@ -2237,6 +2273,14 @@
   END
   v9.CheckSourceFailure(lines, 'E1345: Not a valid command in an interface: return 5', 6)
 
+  # Additional commands after "interface name"
+  lines =<< trim END
+    vim9script
+    interface Something | var x = 10 | var y = 20
+    endinterface
+  END
+  v9.CheckSourceFailure(lines, "E488: Trailing characters: | var x = 10", 2)
+
   lines =<< trim END
     vim9script
     export interface EnterExit
@@ -3233,6 +3277,14 @@
   END
   v9.CheckSourceFailure(lines, 'E1316: Class can only be defined in Vim9 script', 1)
 
+  # Additional commands after "abstract class"
+  lines =<< trim END
+    vim9script
+    abstract class Something | var x = []
+    endclass
+  END
+  v9.CheckSourceFailure(lines, "E488: Trailing characters: | var x = []", 2)
+
   # Abstract class cannot have a "new" function
   lines =<< trim END
     vim9script
diff --git a/src/testdir/test_vim9_enum.vim b/src/testdir/test_vim9_enum.vim
index 274b556..bc54bee 100644
--- a/src/testdir/test_vim9_enum.vim
+++ b/src/testdir/test_vim9_enum.vim
@@ -97,7 +97,16 @@
     vim9script
     enum Something | endenum
   END
-  v9.CheckSourceFailure(lines, 'E1420: Missing :endenum', 3)
+  v9.CheckSourceFailure(lines, 'E488: Trailing characters: | endenum', 2)
+
+  # another command follows the enum name
+  lines =<< trim END
+    vim9script
+    enum Something | var x = 10
+      Foo
+    endenum
+  END
+  v9.CheckSourceFailure(lines, 'E488: Trailing characters: | var x = 10', 2)
 
   # Try to define an enum with the same name as an existing variable
   lines =<< trim END
diff --git a/src/testdir/test_vim9_typealias.vim b/src/testdir/test_vim9_typealias.vim
index 998079c..cf540c2 100644
--- a/src/testdir/test_vim9_typealias.vim
+++ b/src/testdir/test_vim9_typealias.vim
@@ -172,6 +172,14 @@
   END
   v9.CheckSourceSuccess(lines)
 
+  # another command follows a type alias
+  lines =<< trim END
+    vim9script
+    type MyType = number | var x = 20
+    assert_equal(20, x)
+  END
+  v9.CheckSourceSuccess(lines)
+
   # Sourcing a script twice (which will free script local variables)
   # Uses "lines" from the previous test
   new
diff --git a/src/version.c b/src/version.c
index c000e59..cac24ff 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    376,
+/**/
     375,
 /**/
     374,
diff --git a/src/vim9class.c b/src/vim9class.c
index 52c2f76..4314b52 100644
--- a/src/vim9class.c
+++ b/src/vim9class.c
@@ -136,6 +136,13 @@
 	fill_evalarg_from_eap(&evalarg, eap, FALSE);
 	(void)skip_expr_concatenate(&init_arg, &expr_start, &expr_end, &evalarg);
 
+	init_arg = skipwhite(init_arg);
+	if (*init_arg != NUL)
+	{
+	    semsg(_(e_trailing_characters_str), init_arg);
+	    return FAIL;
+	}
+
 	// No type specified for the member.  Set it to "any" and the correct
 	// type will be set when the object is instantiated.
 	if (type == NULL)