diff --git a/CodeBlocker.Test/ScopesTests.cs b/CodeBlocker.Test/ScopesTests.cs
index 701100f..7dc95e2 100644
--- a/CodeBlocker.Test/ScopesTests.cs
+++ b/CodeBlocker.Test/ScopesTests.cs
@@ -164,6 +164,34 @@ public void PragmaScopeWithAnEmptyStringIsANoOp()
 		Assert.AreEqual("public int Value;\n", codeBlocker.ToString());
 	}
 
+	[TestMethod]
+	public void PragmaScopeWithOnlyEmptyWarningEntriesIsANoOp()
+	{
+		using CodeBlocker codeBlocker = Create();
+
+		using (new PragmaScope(codeBlocker, ["", " ", null!]))
+		{
+			codeBlocker.WriteLine("public int Value;");
+		}
+
+		Assert.AreEqual("public int Value;\n", codeBlocker.ToString());
+	}
+
+	[TestMethod]
+	public void PragmaScopeSkipsEmptyWarningEntriesAmongRealOnes()
+	{
+		using CodeBlocker codeBlocker = Create();
+
+		using (new PragmaScope(codeBlocker, ["CS0168", "", " CA1707 "]))
+		{
+			codeBlocker.WriteLine("int x;");
+		}
+
+		Assert.AreEqual(
+			"#pragma warning disable CS0168, CA1707\nint x;\n#pragma warning restore CS0168, CA1707\n",
+			codeBlocker.ToString());
+	}
+
 	[TestMethod]
 	public void PragmaScopeWithAnEmptyWarningSequenceDoesNotAffectAnOuterScope()
 	{
diff --git a/CodeBlocker/Scopes.cs b/CodeBlocker/Scopes.cs
index bbbfb8d..f09d869 100644
--- a/CodeBlocker/Scopes.cs
+++ b/CodeBlocker/Scopes.cs
@@ -178,12 +178,18 @@ public class PragmaScope(CodeBlocker codeBlocker, string warnings)
 	/// Create a new instance of <see cref="PragmaScope"/> suppressing several warnings.
 	/// </summary>
 	/// <param name="codeBlocker">The parent <see cref="CodeBlocker"/>.</param>
-	/// <param name="warnings">The warning identifiers to suppress.</param>
+	/// <param name="warnings">
+	/// The warning identifiers to suppress. Each identifier is trimmed, and null, empty or whitespace
+	/// entries are skipped, so a sequence holding none but those is a no-op and emits no directives.
+	/// </param>
 	public PragmaScope(CodeBlocker codeBlocker, IEnumerable<string> warnings)
-		: this(codeBlocker, string.Join(", ", warnings ?? []))
+		: this(codeBlocker, JoinWarnings(warnings))
 	{
 	}
 
+	private static string JoinWarnings(IEnumerable<string>? warnings) =>
+		string.Join(", ", (warnings ?? []).Where(warning => !string.IsNullOrWhiteSpace(warning)).Select(warning => warning.Trim()));
+
 	private static void Begin(CodeBlocker codeBlocker, string warnings)
 	{
 		Ensure.NotNull(codeBlocker);