diff --git a/src/cli.rs b/src/cli.rs
index a8af01b5..554812f3 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -430,21 +430,16 @@ impl Args {
 
         term::set_coloring(color.as_deref())?;
 
-        if ignore_unknown_features {
-            if features.is_empty() && include_features.is_empty() && group_features.is_empty() {
-                requires("--ignore-unknown-features", &[
-                    "--features",
-                    "--include-features",
-                    "--group-features",
-                ])?;
-            }
-            if !include_features.is_empty() {
-                let _guard = term::warn::scoped(false);
-                // TODO: implement
-                warn!(
-                    "--ignore-unknown-features for --include-features is not fully implemented and may not work as intended"
-                );
-            }
+        if ignore_unknown_features
+            && features.is_empty()
+            && include_features.is_empty()
+            && group_features.is_empty()
+        {
+            requires("--ignore-unknown-features", &[
+                "--features",
+                "--include-features",
+                "--group-features",
+            ])?;
         }
         if !each_feature && !feature_powerset {
             if optional_deps.is_some() {
diff --git a/src/main.rs b/src/main.rs
index 2f126eb7..5665a2d5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -301,6 +301,17 @@ fn determine_kind(cx: &Context, id: PackageId, multiple_packages: bool) -> Optio
         cx.include_features.iter().filter(filter).collect()
     };
 
+    let features = features
+        .into_iter()
+        .filter(|feature| match feature {
+            Feature::Normal { name } => package.features.contains_key(name.as_str()),
+            Feature::Group { list, .. } => {
+                list.iter().any(|name| package.features.contains_key(name.as_str()))
+            }
+            Feature::Path { .. } => true,
+        })
+        .collect::<Vec<_>>();
+
     if cx.each_feature {
         if (pkg_features.normal().is_empty() && pkg_features.optional_deps().is_empty()
             || !cx.include_features.is_empty())
diff --git a/tests/fixtures/include_features_ignore_unknown/Cargo.toml b/tests/fixtures/include_features_ignore_unknown/Cargo.toml
new file mode 100644
index 00000000..03ba668c
--- /dev/null
+++ b/tests/fixtures/include_features_ignore_unknown/Cargo.toml
@@ -0,0 +1,3 @@
+[workspace]
+resolver = "2"
+members = ["features-a-b", "features-a-c", "features-c-d"]
diff --git a/tests/fixtures/include_features_ignore_unknown/features-a-b/Cargo.toml b/tests/fixtures/include_features_ignore_unknown/features-a-b/Cargo.toml
new file mode 100644
index 00000000..f063aa8b
--- /dev/null
+++ b/tests/fixtures/include_features_ignore_unknown/features-a-b/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "features-a-b"
+version = "0.0.0"
+publish = false
+
+[features]
+a = []
+b = []
diff --git a/tests/fixtures/include_features_ignore_unknown/features-a-b/src/lib.rs b/tests/fixtures/include_features_ignore_unknown/features-a-b/src/lib.rs
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/tests/fixtures/include_features_ignore_unknown/features-a-b/src/lib.rs
@@ -0,0 +1 @@
+
diff --git a/tests/fixtures/include_features_ignore_unknown/features-a-c/Cargo.toml b/tests/fixtures/include_features_ignore_unknown/features-a-c/Cargo.toml
new file mode 100644
index 00000000..c81b83bc
--- /dev/null
+++ b/tests/fixtures/include_features_ignore_unknown/features-a-c/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "features-a-c"
+version = "0.0.0"
+publish = false
+
+[features]
+a = []
+c = []
diff --git a/tests/fixtures/include_features_ignore_unknown/features-a-c/src/lib.rs b/tests/fixtures/include_features_ignore_unknown/features-a-c/src/lib.rs
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/tests/fixtures/include_features_ignore_unknown/features-a-c/src/lib.rs
@@ -0,0 +1 @@
+
diff --git a/tests/fixtures/include_features_ignore_unknown/features-c-d/Cargo.toml b/tests/fixtures/include_features_ignore_unknown/features-c-d/Cargo.toml
new file mode 100644
index 00000000..a8d54884
--- /dev/null
+++ b/tests/fixtures/include_features_ignore_unknown/features-c-d/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "features-c-d"
+version = "0.0.0"
+publish = false
+
+[features]
+c = []
+d = []
diff --git a/tests/fixtures/include_features_ignore_unknown/features-c-d/src/lib.rs b/tests/fixtures/include_features_ignore_unknown/features-c-d/src/lib.rs
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/tests/fixtures/include_features_ignore_unknown/features-c-d/src/lib.rs
@@ -0,0 +1 @@
+
diff --git a/tests/test.rs b/tests/test.rs
index 8b8d8e33..4e58f2ae 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -468,21 +468,6 @@ fn ignore_unknown_features_failure() {
             or --group-features
             ",
         );
-
-    cargo_hack([
-        "check",
-        "--ignore-unknown-features",
-        "--feature-powerset",
-        "--include-features",
-        "a",
-    ])
-    .assert_success("real")
-    .stderr_contains(
-        "
-        --ignore-unknown-features for --include-features is not fully implemented and may not \
-        work as intended
-        ",
-    );
 }
 
 #[test]
@@ -2068,3 +2053,45 @@ fn update_readme() {
     let command = "cargo hack --help";
     test_helper::doc::sync_command_output_to_markdown(path, "readme-long-help", command, new);
 }
+
+#[test]
+fn include_features_ignore_unknown() {
+    cargo_hack([
+        "check",
+        "--each-feature",
+        "--include-features",
+        "a,b",
+        "--ignore-unknown-features",
+    ])
+    .assert_success("include_features_ignore_unknown")
+    .stderr_contains(
+        "
+            running `cargo check --no-default-features --features a` on features-a-b (1/4)
+            running `cargo check --no-default-features --features b` on features-a-b (2/4)
+            running `cargo check --no-default-features --features a` on features-a-c (3/4)
+            running `cargo check` on features-c-d (4/4)
+            ",
+    )
+    .stderr_not_contains("--features c")
+    .stderr_not_contains("--features d");
+
+    cargo_hack([
+        "check",
+        "--feature-powerset",
+        "--include-features",
+        "a,b",
+        "--ignore-unknown-features",
+    ])
+    .assert_success("include_features_ignore_unknown")
+    .stderr_contains(
+        "
+            running `cargo check --no-default-features --features a,b` on features-a-b (1/5)
+            running `cargo check --no-default-features --features a` on features-a-b (2/5)
+            running `cargo check --no-default-features --features b` on features-a-b (3/5)
+            running `cargo check --no-default-features --features a` on features-a-c (4/5)
+            running `cargo check` on features-c-d (5/5)
+            ",
+    )
+    .stderr_not_contains("--features c")
+    .stderr_not_contains("--features d");
+}