diff --git a/src/Compiler/Driver/ParseAndCheckInputs.fs b/src/Compiler/Driver/ParseAndCheckInputs.fs
index 59da87b1bbe..1ef4132a094 100644
--- a/src/Compiler/Driver/ParseAndCheckInputs.fs
+++ b/src/Compiler/Driver/ParseAndCheckInputs.fs
@@ -271,29 +271,6 @@ let GetScopedPragmas (langVersion: LanguageVersion) hashDirectives =
     |> List.fold processWarnDirectiveInfo (Map.empty, [])
     |> addOpenPragmas
 
-let GetScopedPragmasForHashDirective hd (langVersion: LanguageVersion) =
-    let supportsNonStringArguments =
-        langVersion.SupportsFeature(LanguageFeature.ParsedHashDirectiveArgumentNonQuotes)
-
-    [
-        match hd with
-        | ParsedHashDirective("nowarn", numbers, m) ->
-            for s in numbers do
-                let warningNumber =
-                    match supportsNonStringArguments, s with
-                    | _, ParsedHashDirectiveArgument.SourceIdentifier _ -> None
-                    | true, ParsedHashDirectiveArgument.LongIdent _ -> None
-                    | true, ParsedHashDirectiveArgument.Int32(n, _) -> GetWarningNumber(m, string n, true)
-                    | true, ParsedHashDirectiveArgument.Ident(s, _) -> GetWarningNumber(m, s.idText, true)
-                    | _, ParsedHashDirectiveArgument.String(s, _, _) -> GetWarningNumber(m, s, true)
-                    | _ -> None
-
-                match warningNumber with
-                | None -> ()
-                | Some n -> ScopedPragma.WarningOff(m, n)
-        | _ -> ()
-    ]
-
 let private collectCodeComments (lexbuf: UnicodeLexing.Lexbuf) (tripleSlashComments: range list) =
     [
         yield! LexbufCommentStore.GetComments(lexbuf)
@@ -308,7 +285,7 @@ let PostParseModuleImpls
         defaultNamespace,
         fileName,
         isLastCompiland,
-        ParsedImplFile(toplevelHashDirectives, impls),
+        ParsedImplFile(toplevelHashDirectives, impls), // Are toplevelHashDirectives ever non-empty??
         lexbuf: UnicodeLexing.Lexbuf,
         tripleSlashComments: range list,
         identifiers: Set<string>
@@ -373,7 +350,7 @@ let PostParseModuleSpecs
         defaultNamespace,
         fileName,
         isLastCompiland,
-        ParsedSigFile(hashDirectives, specs),
+        ParsedSigFile(toplevelHashDirectives, specs), // Can toplevelHashDirectives ever be non-empty??
         lexbuf: UnicodeLexing.Lexbuf,
         tripleSlashComments: range list,
         identifiers: Set<string>
@@ -396,15 +373,18 @@ let PostParseModuleSpecs
     let qualName = QualFileNameOfSpecs fileName specs
 
     let scopedPragmas =
-        [
-            for SynModuleOrNamespaceSig(decls = decls) in specs do
-                for d in decls do
-                    match d with
-                    | SynModuleSigDecl.HashDirective(hd, _) -> yield! GetScopedPragmasForHashDirective hd lexbuf.LanguageVersion
-                    | _ -> ()
-            for hd in hashDirectives do
-                yield! GetScopedPragmasForHashDirective hd lexbuf.LanguageVersion
-        ]
+        let hashDirectives =
+            let getModuleSigHashDirectives (SynModuleOrNamespaceSig(decls = decls)) =
+                let getModuleDeclSigHashDirectives decl =
+                    match decl with
+                    | SynModuleSigDecl.HashDirective(hd, _) -> Some hd
+                    | _ -> None
+
+                decls |> List.choose getModuleDeclSigHashDirectives
+
+            (specs |> List.collect getModuleSigHashDirectives) @ toplevelHashDirectives
+
+        hashDirectives |> GetScopedPragmas lexbuf.LanguageVersion
 
     let conditionalDirectives = LexbufIfdefStore.GetTrivia(lexbuf)
     let codeComments = collectCodeComments lexbuf tripleSlashComments
@@ -415,7 +395,7 @@ let PostParseModuleSpecs
             CodeComments = codeComments
         }
 
-    ParsedInput.SigFile(ParsedSigFileInput(fileName, qualName, scopedPragmas, hashDirectives, specs, trivia, identifiers))
+    ParsedInput.SigFile(ParsedSigFileInput(fileName, qualName, scopedPragmas, toplevelHashDirectives, specs, trivia, identifiers))
 
 type ModuleNamesDict = Map<string, Map<string, QualifiedNameOfFile>>
 
diff --git a/tests/FSharp.Compiler.ComponentTests/CompilerDirectives/Nowarn.fs b/tests/FSharp.Compiler.ComponentTests/CompilerDirectives/Nowarn.fs
index a1a9cae1aa0..69b8daf7bb7 100644
--- a/tests/FSharp.Compiler.ComponentTests/CompilerDirectives/Nowarn.fs
+++ b/tests/FSharp.Compiler.ComponentTests/CompilerDirectives/Nowarn.fs
@@ -6,7 +6,6 @@ open FSharp.Test.Compiler
 module Nowarn =
 
     let private warning25Text = "Incomplete pattern matches on this expression. For example, the value 'Some (_)' may indicate a case not covered by the pattern(s)."
-    let private error3350Text = "Feature '# directives with non-quoted string arguments' is not available in F# 8.0. Please use language version 'PREVIEW' or greater."
     let private warning44Text = "This construct is deprecated"
     
     let private sourceForWarningIsSuppressed = """
@@ -30,29 +29,7 @@ match None with None -> ()
             Warning 25, Line 7, Col 7, Line 7, Col 11, warning25Text
         ]
 
-    let private scriptForWarningIsSuppressed = """
-
-match None with None -> ()
-#nowarn "25"
-match None with None -> ()
-#warnon "25"
-match None with None -> ()
-#nowarn "25"
-match None with None -> ()
-    """
-    
-    [<Fact>]
-    let ``warning is suppressed between nowarn and warnon directives (in script)`` () =
-        Fsx scriptForWarningIsSuppressed
-        |> withLangVersionPreview
-        |> compile
-        |> withDiagnostics [
-            // These warnings should appear if we make scripts spec-compliant
-            // Warning 25, Line 3, Col 7, Line 3, Col 11, matchNoneErrorMessage
-            // Warning 25, Line 7, Col 7, Line 7, Col 11, matchNoneErrorMessage
-        ]
-
-    let private sourceForWarningIsSuppressedInSigFile = """
+    let private sigSourceForWarningIsSuppressedInSigFile = """
 module A
 open System
 [<Obsolete>]
@@ -66,12 +43,47 @@ type T4 = T
 type T5 = T
     """
     
+    let private sourceForWarningIsSuppressedInSigFile = """
+module A
+#nowarn "44"
+open System
+[<Obsolete>]
+type T = class end
+type T2 = T
+type T3 = T
+type T4 = T
+type T5 = T
+    """
+    
     [<Fact>]
     let ``warning is suppressed between nowarn and warnon directives in a signature file`` () =
-        Fsi sourceForWarningIsSuppressedInSigFile
+        Fsi sigSourceForWarningIsSuppressedInSigFile
+        |> withAdditionalSourceFile (FsSource sourceForWarningIsSuppressedInSigFile)
         |> withLangVersionPreview
         |> compile
         |> withDiagnostics [
             Warning 44, Line 6, Col 11, Line 6, Col 12, warning44Text
             Warning 44, Line 10, Col 11, Line 10, Col 12, warning44Text
         ]
+
+    let private scriptForWarningIsSuppressed = """
+
+match None with None -> ()
+#nowarn "25"
+match None with None -> ()
+#warnon "25"
+match None with None -> ()
+#nowarn "25"
+match None with None -> ()
+    """
+    
+    [<Fact>]
+    let ``warning is suppressed between nowarn and warnon directives (in script)`` () =
+        Fsx scriptForWarningIsSuppressed
+        |> withLangVersionPreview
+        |> compile
+        |> withDiagnostics [
+            // These warnings should appear if we make scripts spec-compliant
+            // Warning 25, Line 3, Col 7, Line 3, Col 11, matchNoneErrorMessage
+            // Warning 25, Line 7, Col 7, Line 7, Col 11, matchNoneErrorMessage
+        ]