diff --git a/src/xatu/BUILD b/src/xatu/BUILD
index 85abfea..8a1f8fb 100644
--- a/src/xatu/BUILD
+++ b/src/xatu/BUILD
@@ -28,13 +28,6 @@ rust_test(
 rust_test(
     name = "xatu_test",
     srcs = ["xatu_test.rs"],
-    data = [
-        "testdata/clean.nix",
-        "testdata/deprecated_to_path_ident.nix",
-        "testdata/deprecated_to_path_select.nix",
-        "testdata/empty_inherit.nix",
-        "testdata/invalid.nix",
-    ],
     deps = [
         ":xatu_lib",
         "//src/status:status",
diff --git a/src/xatu/testdata/clean.nix b/src/xatu/testdata/clean.nix
deleted file mode 100644
index a48f8c9..0000000
--- a/src/xatu/testdata/clean.nix
+++ /dev/null
@@ -1 +0,0 @@
-{ inherit foo; }
diff --git a/src/xatu/testdata/deprecated_to_path_ident.nix b/src/xatu/testdata/deprecated_to_path_ident.nix
deleted file mode 100644
index 5d2d9bb..0000000
--- a/src/xatu/testdata/deprecated_to_path_ident.nix
+++ /dev/null
@@ -1 +0,0 @@
-toPath x
diff --git a/src/xatu/testdata/deprecated_to_path_select.nix b/src/xatu/testdata/deprecated_to_path_select.nix
deleted file mode 100644
index fa6ea4f..0000000
--- a/src/xatu/testdata/deprecated_to_path_select.nix
+++ /dev/null
@@ -1 +0,0 @@
-builtins.toPath x
diff --git a/src/xatu/testdata/empty_inherit.nix b/src/xatu/testdata/empty_inherit.nix
deleted file mode 100644
index 73a66e4..0000000
--- a/src/xatu/testdata/empty_inherit.nix
+++ /dev/null
@@ -1 +0,0 @@
-{ inherit; }
diff --git a/src/xatu/testdata/invalid.nix b/src/xatu/testdata/invalid.nix
deleted file mode 100644
index 98232c6..0000000
--- a/src/xatu/testdata/invalid.nix
+++ /dev/null
@@ -1 +0,0 @@
-{
diff --git a/src/xatu/xatu_test.rs b/src/xatu/xatu_test.rs
index 6d10aaf..8e612a4 100644
--- a/src/xatu/xatu_test.rs
+++ b/src/xatu/xatu_test.rs
@@ -1,29 +1,21 @@
-use std::path::{Path, PathBuf};
+use std::path::PathBuf;
 
 use status::Code;
 use xatu::SourceFile;
 
-fn source_file(path: &str) -> SourceFile {
+fn source_file(path: &str, source: &str) -> SourceFile {
     SourceFile {
         path: PathBuf::from(path),
-        source: std::fs::read_to_string(testdata_path(path)).expect("fixture should be readable"),
+        source: source.to_owned(),
     }
 }
 
-fn testdata_path(path: &str) -> PathBuf {
-    if Path::new(path).exists() {
-        return PathBuf::from(path);
-    }
-
-    let runfiles = PathBuf::from(std::env::var("TEST_SRCDIR").expect("TEST_SRCDIR should be set"));
-    let workspace = std::env::var("TEST_WORKSPACE").expect("TEST_WORKSPACE should be set");
-
-    runfiles.join(workspace).join("src/xatu").join(path)
-}
-
 #[test]
 fn future_sight_reports_clean_sources_as_clean() {
-    let report = xatu::future_sight(vec![source_file("testdata/clean.nix")])
+    let report = xatu::future_sight(vec![source_file(
+        "clean.nix",
+        "{ value = builtins.toString x; inherit foo; }",
+    )])
     .expect("fixture should parse");
 
     assert!(report.is_clean());
@@ -31,15 +23,15 @@ fn future_sight_reports_clean_sources_as_clean() {
 
 #[test]
 fn future_sight_rejects_parse_errors() {
-    let error = xatu::future_sight(vec![source_file("testdata/invalid.nix")])
-    .expect_err("fixture should fail to parse");
+    let error = xatu::future_sight(vec![source_file("invalid.nix", "{")])
+        .expect_err("fixture should fail to parse");
 
     assert_eq!(error.code(), Code::FailedPrecondition);
 }
 
 #[test]
 fn future_sight_reports_deprecated_to_path_ident_findings() {
-    let report = xatu::future_sight(vec![source_file("testdata/deprecated_to_path_ident.nix")])
+    let report = xatu::future_sight(vec![source_file("deprecated_to_path_ident.nix", "toPath x")])
         .expect("fixture should parse");
 
     assert_eq!(report.diagnostics.len(), 1);
@@ -47,29 +39,32 @@ fn future_sight_reports_deprecated_to_path_ident_findings() {
     let diagnostic = &report.diagnostics[0];
     assert_eq!(
         report.files.get(diagnostic.file_id).path,
-        PathBuf::from("testdata/deprecated_to_path_ident.nix"),
+        PathBuf::from("deprecated_to_path_ident.nix"),
     );
     assert_eq!(diagnostic.finding.rule_id, "deprecated_to_path");
 }
 
 #[test]
 fn future_sight_reports_deprecated_to_path_select_findings() {
-    let report = xatu::future_sight(vec![source_file("testdata/deprecated_to_path_select.nix")])
-        .expect("fixture should parse");
+    let report = xatu::future_sight(vec![source_file(
+        "deprecated_to_path_select.nix",
+        "builtins.toPath x",
+    )])
+    .expect("fixture should parse");
 
     assert_eq!(report.diagnostics.len(), 1);
 
     let diagnostic = &report.diagnostics[0];
     assert_eq!(
         report.files.get(diagnostic.file_id).path,
-        PathBuf::from("testdata/deprecated_to_path_select.nix"),
+        PathBuf::from("deprecated_to_path_select.nix"),
     );
     assert_eq!(diagnostic.finding.rule_id, "deprecated_to_path");
 }
 
 #[test]
 fn future_sight_reports_empty_inherit_findings() {
-    let report = xatu::future_sight(vec![source_file("testdata/empty_inherit.nix")])
+    let report = xatu::future_sight(vec![source_file("empty_inherit.nix", "{ inherit; }")])
         .expect("fixture should parse");
 
     assert_eq!(report.diagnostics.len(), 1);
@@ -77,7 +72,7 @@ fn future_sight_reports_empty_inherit_findings() {
     let diagnostic = &report.diagnostics[0];
     assert_eq!(
         report.files.get(diagnostic.file_id).path,
-        PathBuf::from("testdata/empty_inherit.nix"),
+        PathBuf::from("empty_inherit.nix"),
     );
     assert_eq!(diagnostic.finding.rule_id, "empty_inherit");
 }