diff --git a/compiler/src/dotty/tools/dotc/parsing/Tokens.scala b/compiler/src/dotty/tools/dotc/parsing/Tokens.scala
index c78a336ecdf5..689e6af486b1 100644
--- a/compiler/src/dotty/tools/dotc/parsing/Tokens.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/Tokens.scala
@@ -257,7 +257,7 @@ object Tokens extends TokensCommon {
 
   final val modifierTokensOrCase: TokenSet = modifierTokens | BitSet(CASE)
 
-  final val modifierFollowers = modifierTokens | defIntroTokens
+  final val modifierFollowers = modifierTokensOrCase | defIntroTokens
 
   /** Is token only legal as start of statement (eof also included)? */
   final val mustStartStatTokens: TokenSet = defIntroTokens | modifierTokens | BitSet(IMPORT, EXPORT, PACKAGE)
diff --git a/tests/neg/i18933.check b/tests/neg/i18933.check
deleted file mode 100644
index dc4db455c2de..000000000000
--- a/tests/neg/i18933.check
+++ /dev/null
@@ -1,10 +0,0 @@
--- Error: tests/neg/i18933.scala:3:8 -----------------------------------------------------------------------------------
-3 |  infix case B(b: B) // error // error
-  |        ^^^^
-  |        end of statement expected but 'case' found
--- [E006] Not Found Error: tests/neg/i18933.scala:3:2 ------------------------------------------------------------------
-3 |  infix case B(b: B) // error // error
-  |  ^^^^^
-  |  Not found: infix
-  |
-  | longer explanation available when compiling with `-explain`
diff --git a/tests/neg/i18933.scala b/tests/neg/i18933.scala
deleted file mode 100644
index 7802c3961a25..000000000000
--- a/tests/neg/i18933.scala
+++ /dev/null
@@ -1,3 +0,0 @@
-enum Extends[A, B]:
-  case A(a: A)
-  infix case B(b: B) // error // error
diff --git a/tests/neg/i5525.scala b/tests/neg/i5525.scala
index 12ffb4704ba9..ceec2c90173f 100644
--- a/tests/neg/i5525.scala
+++ b/tests/neg/i5525.scala
@@ -29,6 +29,6 @@ enum Foo11 {
   protected case C9  // ok
 }
 
-enum Foo12 {  // error: Enumerations must contain at least one case
+enum Foo12 {
   inline    case C10() // error: only access modifiers allowed
 }
\ No newline at end of file
diff --git a/tests/neg/i5525b.scala b/tests/neg/i5525b.scala
index d51564ad52c1..23fbba4d5409 100644
--- a/tests/neg/i5525b.scala
+++ b/tests/neg/i5525b.scala
@@ -2,10 +2,10 @@
 
 erased   enum Foo6 {} // error: only access modifiers allowed
 
-enum Foo10 { // error: Enumerations must contain at least one case
-  erased    case C6()  // error // error
+enum Foo10 {
+  erased    case C6()  // error
 }
 
-enum Foo11 { // error: Enumerations must contain at least one case
-  erased    case C6  // error // error
+enum Foo11 {
+  erased    case C6  // error
 }
diff --git a/tests/pos/i22010.scala b/tests/pos/i22010.scala
new file mode 100644
index 000000000000..6962f02a1e20
--- /dev/null
+++ b/tests/pos/i22010.scala
@@ -0,0 +1,7 @@
+//> using options -source:future
+
+enum Expr1:
+  infix case Add1[L, R](l: L, r: R)
+
+import Expr1.Add1
+val foo: 1 Add1 2 = ???