diff --git a/crates/ra_db/src/input.rs b/crates/ra_db/src/input.rs
index 5fd6edd78d1..23148096cb1 100644
--- a/crates/ra_db/src/input.rs
+++ b/crates/ra_db/src/input.rs
@@ -114,9 +114,8 @@ struct CrateData {
 }
 
 impl CrateData {
-    fn new(file_id: FileId, edition: Edition) -> CrateData {
-        // FIXME: cfg options
-        CrateData { file_id, edition, dependencies: Vec::new(), cfg_options: CfgOptions::default() }
+    fn new(file_id: FileId, edition: Edition, cfg_options: CfgOptions) -> CrateData {
+        CrateData { file_id, edition, dependencies: Vec::new(), cfg_options }
     }
 
     fn add_dep(&mut self, name: SmolStr, crate_id: CrateId) {
@@ -137,9 +136,14 @@ impl Dependency {
 }
 
 impl CrateGraph {
-    pub fn add_crate_root(&mut self, file_id: FileId, edition: Edition) -> CrateId {
+    pub fn add_crate_root(
+        &mut self,
+        file_id: FileId,
+        edition: Edition,
+        cfg_options: CfgOptions,
+    ) -> CrateId {
         let crate_id = CrateId(self.arena.len() as u32);
-        let prev = self.arena.insert(crate_id, CrateData::new(file_id, edition));
+        let prev = self.arena.insert(crate_id, CrateData::new(file_id, edition, cfg_options));
         assert!(prev.is_none());
         crate_id
     }
@@ -228,14 +232,14 @@ impl CrateGraph {
 
 #[cfg(test)]
 mod tests {
-    use super::{CrateGraph, Edition::Edition2018, FileId, SmolStr};
+    use super::{CfgOptions, CrateGraph, Edition::Edition2018, FileId, SmolStr};
 
     #[test]
     fn it_should_panic_because_of_cycle_dependencies() {
         let mut graph = CrateGraph::default();
-        let crate1 = graph.add_crate_root(FileId(1u32), Edition2018);
-        let crate2 = graph.add_crate_root(FileId(2u32), Edition2018);
-        let crate3 = graph.add_crate_root(FileId(3u32), Edition2018);
+        let crate1 = graph.add_crate_root(FileId(1u32), Edition2018, CfgOptions::default());
+        let crate2 = graph.add_crate_root(FileId(2u32), Edition2018, CfgOptions::default());
+        let crate3 = graph.add_crate_root(FileId(3u32), Edition2018, CfgOptions::default());
         assert!(graph.add_dep(crate1, SmolStr::new("crate2"), crate2).is_ok());
         assert!(graph.add_dep(crate2, SmolStr::new("crate3"), crate3).is_ok());
         assert!(graph.add_dep(crate3, SmolStr::new("crate1"), crate1).is_err());
@@ -244,9 +248,9 @@ mod tests {
     #[test]
     fn it_works() {
         let mut graph = CrateGraph::default();
-        let crate1 = graph.add_crate_root(FileId(1u32), Edition2018);
-        let crate2 = graph.add_crate_root(FileId(2u32), Edition2018);
-        let crate3 = graph.add_crate_root(FileId(3u32), Edition2018);
+        let crate1 = graph.add_crate_root(FileId(1u32), Edition2018, CfgOptions::default());
+        let crate2 = graph.add_crate_root(FileId(2u32), Edition2018, CfgOptions::default());
+        let crate3 = graph.add_crate_root(FileId(3u32), Edition2018, CfgOptions::default());
         assert!(graph.add_dep(crate1, SmolStr::new("crate2"), crate2).is_ok());
         assert!(graph.add_dep(crate2, SmolStr::new("crate3"), crate3).is_ok());
     }
diff --git a/crates/ra_hir/src/mock.rs b/crates/ra_hir/src/mock.rs
index 50feb98fb35..f750986b8b3 100644
--- a/crates/ra_hir/src/mock.rs
+++ b/crates/ra_hir/src/mock.rs
@@ -3,6 +3,7 @@
 use std::{panic, sync::Arc};
 
 use parking_lot::Mutex;
+use ra_cfg::CfgOptions;
 use ra_db::{
     salsa, CrateGraph, CrateId, Edition, FileId, FilePosition, SourceDatabase, SourceRoot,
     SourceRootId,
@@ -74,13 +75,13 @@ impl MockDatabase {
     pub fn set_crate_graph_from_fixture(&mut self, graph: CrateGraphFixture) {
         let mut ids = FxHashMap::default();
         let mut crate_graph = CrateGraph::default();
-        for (crate_name, (crate_root, edition, _)) in graph.0.iter() {
+        for (crate_name, (crate_root, edition, cfg_options, _)) in graph.0.iter() {
             let crate_root = self.file_id_of(&crate_root);
-            let crate_id = crate_graph.add_crate_root(crate_root, *edition);
+            let crate_id = crate_graph.add_crate_root(crate_root, *edition, cfg_options.clone());
             Arc::make_mut(&mut self.crate_names).insert(crate_id, crate_name.clone());
             ids.insert(crate_name, crate_id);
         }
-        for (crate_name, (_, _, deps)) in graph.0.iter() {
+        for (crate_name, (_, _, _, deps)) in graph.0.iter() {
             let from = ids[crate_name];
             for dep in deps {
                 let to = ids[dep];
@@ -184,7 +185,7 @@ impl MockDatabase {
 
         if is_crate_root {
             let mut crate_graph = CrateGraph::default();
-            crate_graph.add_crate_root(file_id, Edition::Edition2018);
+            crate_graph.add_crate_root(file_id, Edition::Edition2018, CfgOptions::default());
             self.set_crate_graph(Arc::new(crate_graph));
         }
         file_id
@@ -268,19 +269,27 @@ impl MockDatabase {
 }
 
 #[derive(Default)]
-pub struct CrateGraphFixture(pub Vec<(String, (String, Edition, Vec<String>))>);
+pub struct CrateGraphFixture(pub Vec<(String, (String, Edition, CfgOptions, Vec<String>))>);
 
 #[macro_export]
 macro_rules! crate_graph {
-    ($($crate_name:literal: ($crate_path:literal, $($edition:literal,)? [$($dep:literal),*]),)*) => {{
+    ($(
+        $crate_name:literal: (
+            $crate_path:literal,
+            $($edition:literal,)?
+            [$($dep:literal),*]
+            $(,$cfg:expr)?
+        ),
+    )*) => {{
         let mut res = $crate::mock::CrateGraphFixture::default();
         $(
             #[allow(unused_mut, unused_assignments)]
             let mut edition = ra_db::Edition::Edition2018;
             $(edition = ra_db::Edition::from_string($edition);)?
+            let cfg_options = { ::ra_cfg::CfgOptions::default() $(; $cfg)? };
             res.0.push((
                 $crate_name.to_string(),
-                ($crate_path.to_string(), edition, vec![$($dep.to_string()),*])
+                ($crate_path.to_string(), edition, cfg_options, vec![$($dep.to_string()),*])
             ));
         )*
         res
diff --git a/crates/ra_hir/src/nameres/tests.rs b/crates/ra_hir/src/nameres/tests.rs
index bc4b47b704c..f43767e5958 100644
--- a/crates/ra_hir/src/nameres/tests.rs
+++ b/crates/ra_hir/src/nameres/tests.rs
@@ -7,6 +7,7 @@ mod mod_resolution;
 use std::sync::Arc;
 
 use insta::assert_snapshot;
+use ra_cfg::CfgOptions;
 use ra_db::SourceDatabase;
 use test_utils::covers;
 
@@ -507,3 +508,72 @@ fn values_dont_shadow_extern_crates() {
         ⋮foo: v
     "###);
 }
+
+#[test]
+fn cfg_not_test() {
+    let map = def_map_with_crate_graph(
+        r#"
+        //- /main.rs
+        use {Foo, Bar, Baz};
+        //- /lib.rs
+        #[prelude_import]
+        pub use self::prelude::*;
+        mod prelude {
+            #[cfg(test)]
+            pub struct Foo;
+            #[cfg(not(test))]
+            pub struct Bar;
+            #[cfg(all(not(any()), feature = "foo", feature = "bar", opt = "42"))]
+            pub struct Baz;
+        }
+        "#,
+        crate_graph! {
+            "main": ("/main.rs", ["std"]),
+            "std": ("/lib.rs", []),
+        },
+    );
+
+    assert_snapshot!(map, @r###"
+        ⋮crate
+        ⋮Bar: t v
+        ⋮Baz: _
+        ⋮Foo: _
+    "###);
+}
+
+#[test]
+fn cfg_test() {
+    let map = def_map_with_crate_graph(
+        r#"
+        //- /main.rs
+        use {Foo, Bar, Baz};
+        //- /lib.rs
+        #[prelude_import]
+        pub use self::prelude::*;
+        mod prelude {
+            #[cfg(test)]
+            pub struct Foo;
+            #[cfg(not(test))]
+            pub struct Bar;
+            #[cfg(all(not(any()), feature = "foo", feature = "bar", opt = "42"))]
+            pub struct Baz;
+        }
+        "#,
+        crate_graph! {
+            "main": ("/main.rs", ["std"]),
+            "std": ("/lib.rs", [], CfgOptions::default()
+                .atom("test".into())
+                .feature("foo".into())
+                .feature("bar".into())
+                .option("opt".into(), "42".into())
+            ),
+        },
+    );
+
+    assert_snapshot!(map, @r###"
+        ⋮crate
+        ⋮Bar: _
+        ⋮Baz: t v
+        ⋮Foo: t v
+    "###);
+}
diff --git a/crates/ra_ide_api/Cargo.toml b/crates/ra_ide_api/Cargo.toml
index 6bbf9d5dde0..f919a2d6152 100644
--- a/crates/ra_ide_api/Cargo.toml
+++ b/crates/ra_ide_api/Cargo.toml
@@ -23,6 +23,7 @@ rand = { version = "0.7.0", features = ["small_rng"] }
 ra_syntax = { path = "../ra_syntax" }
 ra_text_edit = { path = "../ra_text_edit" }
 ra_db = { path = "../ra_db" }
+ra_cfg = { path = "../ra_cfg" }
 ra_fmt = { path = "../ra_fmt" }
 ra_prof = { path = "../ra_prof" }
 hir = { path = "../ra_hir", package = "ra_hir" }
diff --git a/crates/ra_ide_api/src/lib.rs b/crates/ra_ide_api/src/lib.rs
index 44d1ec77b0c..24f1b91f68c 100644
--- a/crates/ra_ide_api/src/lib.rs
+++ b/crates/ra_ide_api/src/lib.rs
@@ -49,6 +49,7 @@ mod test_utils;
 
 use std::sync::Arc;
 
+use ra_cfg::CfgOptions;
 use ra_db::{
     salsa::{self, ParallelDatabase},
     CheckCanceled, SourceDatabase,
@@ -322,7 +323,10 @@ impl Analysis {
         change.add_root(source_root, true);
         let mut crate_graph = CrateGraph::default();
         let file_id = FileId(0);
-        crate_graph.add_crate_root(file_id, Edition::Edition2018);
+        // FIXME: cfg options
+        // Default to enable test for single file.
+        let cfg_options = CfgOptions::default().atom("test".into());
+        crate_graph.add_crate_root(file_id, Edition::Edition2018, cfg_options);
         change.add_file(source_root, file_id, "main.rs".into(), Arc::new(text));
         change.set_crate_graph(crate_graph);
         host.apply_change(change);
diff --git a/crates/ra_ide_api/src/mock_analysis.rs b/crates/ra_ide_api/src/mock_analysis.rs
index 16870c7ae49..13258b63dd9 100644
--- a/crates/ra_ide_api/src/mock_analysis.rs
+++ b/crates/ra_ide_api/src/mock_analysis.rs
@@ -2,6 +2,7 @@
 
 use std::sync::Arc;
 
+use ra_cfg::CfgOptions;
 use relative_path::RelativePathBuf;
 use test_utils::{extract_offset, extract_range, parse_fixture, CURSOR_MARKER};
 
@@ -93,10 +94,12 @@ impl MockAnalysis {
             assert!(path.starts_with('/'));
             let path = RelativePathBuf::from_path(&path[1..]).unwrap();
             let file_id = FileId(i as u32 + 1);
+            // FIXME: cfg options
+            let cfg_options = CfgOptions::default();
             if path == "/lib.rs" || path == "/main.rs" {
-                root_crate = Some(crate_graph.add_crate_root(file_id, Edition2018));
+                root_crate = Some(crate_graph.add_crate_root(file_id, Edition2018, cfg_options));
             } else if path.ends_with("/lib.rs") {
-                let other_crate = crate_graph.add_crate_root(file_id, Edition2018);
+                let other_crate = crate_graph.add_crate_root(file_id, Edition2018, cfg_options);
                 let crate_name = path.parent().unwrap().file_name().unwrap();
                 if let Some(root_crate) = root_crate {
                     crate_graph.add_dep(root_crate, crate_name.into(), other_crate).unwrap();
diff --git a/crates/ra_ide_api/src/parent_module.rs b/crates/ra_ide_api/src/parent_module.rs
index c85f1d0d02f..56650984995 100644
--- a/crates/ra_ide_api/src/parent_module.rs
+++ b/crates/ra_ide_api/src/parent_module.rs
@@ -41,6 +41,7 @@ mod tests {
         AnalysisChange, CrateGraph,
         Edition::Edition2018,
     };
+    use ra_cfg::CfgOptions;
 
     #[test]
     fn test_resolve_parent_module() {
@@ -88,7 +89,7 @@ mod tests {
         assert!(host.analysis().crate_for(mod_file).unwrap().is_empty());
 
         let mut crate_graph = CrateGraph::default();
-        let crate_id = crate_graph.add_crate_root(root_file, Edition2018);
+        let crate_id = crate_graph.add_crate_root(root_file, Edition2018, CfgOptions::default());
         let mut change = AnalysisChange::new();
         change.set_crate_graph(crate_graph);
         host.apply_change(change);
diff --git a/crates/ra_project_model/Cargo.toml b/crates/ra_project_model/Cargo.toml
index ae6b91aa69b..a651000315b 100644
--- a/crates/ra_project_model/Cargo.toml
+++ b/crates/ra_project_model/Cargo.toml
@@ -12,6 +12,7 @@ cargo_metadata = "0.8.2"
 
 ra_arena = { path = "../ra_arena" }
 ra_db = { path = "../ra_db" }
+ra_cfg = { path = "../ra_cfg" }
 
 serde = { version = "1.0.89", features = ["derive"] }
 serde_json = "1.0.39"
diff --git a/crates/ra_project_model/src/lib.rs b/crates/ra_project_model/src/lib.rs
index 5d307859805..5ff3971e064 100644
--- a/crates/ra_project_model/src/lib.rs
+++ b/crates/ra_project_model/src/lib.rs
@@ -11,6 +11,7 @@ use std::{
     path::{Path, PathBuf},
 };
 
+use ra_cfg::CfgOptions;
 use ra_db::{CrateGraph, CrateId, Edition, FileId};
 use rustc_hash::FxHashMap;
 use serde_json::from_reader;
@@ -131,7 +132,13 @@ impl ProjectWorkspace {
                             json_project::Edition::Edition2015 => Edition::Edition2015,
                             json_project::Edition::Edition2018 => Edition::Edition2018,
                         };
-                        crates.insert(crate_id, crate_graph.add_crate_root(file_id, edition));
+                        // FIXME: cfg options
+                        // Default to enable test for workspace crates.
+                        let cfg_options = CfgOptions::default().atom("test".into());
+                        crates.insert(
+                            crate_id,
+                            crate_graph.add_crate_root(file_id, edition, cfg_options),
+                        );
                     }
                 }
 
@@ -157,7 +164,11 @@ impl ProjectWorkspace {
                 let mut sysroot_crates = FxHashMap::default();
                 for krate in sysroot.crates() {
                     if let Some(file_id) = load(krate.root(&sysroot)) {
-                        let crate_id = crate_graph.add_crate_root(file_id, Edition::Edition2018);
+                        // FIXME: cfg options
+                        // Crates from sysroot have `cfg(test)` disabled
+                        let cfg_options = CfgOptions::default();
+                        let crate_id =
+                            crate_graph.add_crate_root(file_id, Edition::Edition2018, cfg_options);
                         sysroot_crates.insert(krate, crate_id);
                         names.insert(crate_id, krate.name(&sysroot).to_string());
                     }
@@ -186,7 +197,11 @@ impl ProjectWorkspace {
                         let root = tgt.root(&cargo);
                         if let Some(file_id) = load(root) {
                             let edition = pkg.edition(&cargo);
-                            let crate_id = crate_graph.add_crate_root(file_id, edition);
+                            // FIXME: cfg options
+                            // Default to enable test for workspace crates.
+                            let cfg_options = CfgOptions::default().atom("test".into());
+                            let crate_id =
+                                crate_graph.add_crate_root(file_id, edition, cfg_options);
                             names.insert(crate_id, pkg.name(&cargo).to_string());
                             if tgt.kind(&cargo) == TargetKind::Lib {
                                 lib_tgt = Some(crate_id);