diff --git a/src/builtins/bitwise.rs b/src/builtins/bitwise.rs
index 572ea5dd..ef1efcf9 100644
--- a/src/builtins/bitwise.rs
+++ b/src/builtins/bitwise.rs
@@ -14,7 +14,7 @@ use anyhow::Result;
 
 pub fn register(m: &mut HashMap<&'static str, builtins::BuiltinFcn>) {
     m.insert("bits.and", and);
-    m.insert("bits.and", lsh);
+    m.insert("bits.lsh", lsh);
     m.insert("bits.negate", negate);
     m.insert("bits.or", or);
     m.insert("bits.rsh", rsh);
diff --git a/tests/interpreter/cases/builtins/bitwise/and.yaml b/tests/interpreter/cases/builtins/bitwise/and.yaml
new file mode 100644
index 00000000..63e8d891
--- /dev/null
+++ b/tests/interpreter/cases/builtins/bitwise/and.yaml
@@ -0,0 +1,60 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+cases:
+  - note: bits.and.error.wrongtype1
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.and(1, "str")
+    query: data.test
+    error: "`bits.and` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.and.error.wrongtype2
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.and("str", 1)
+    query: data.test
+    error: "`bits.and` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.and.error.morearg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.and(1, 1, 1)
+    query: data.test
+    error: "`bits.and` expects 2 arguments"
+
+  - note: bits.and.error.lessarg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.and(1)
+    query: data.test
+    error: "`bits.and` expects 2 arguments"
+
+  - note: bits.and
+    data: {}
+    modules:
+      - |
+        package test
+
+        x1 = bits.and(1, 0)
+        x2 = bits.and(1, 1)
+        x3 = bits.and(0, 0)
+        x4 = bits.and(0, 1)
+    query: data.test
+    want_result:
+      x1 : 0
+      x2 : 1
+      x3 : 0
+      x4 : 0
diff --git a/tests/interpreter/cases/builtins/bitwise/lsh.yaml b/tests/interpreter/cases/builtins/bitwise/lsh.yaml
new file mode 100644
index 00000000..a6e98f95
--- /dev/null
+++ b/tests/interpreter/cases/builtins/bitwise/lsh.yaml
@@ -0,0 +1,54 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+cases:
+  - note: bits.lsh.error.wrongtype1
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.lsh(1, "str")
+    query: data.test
+    error: "`bits.lsh` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.lsh.error.wrongtype2
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.lsh("str", 1)
+    query: data.test
+    error: "`bits.lsh` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.lsh.error.morearg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.lsh(1, 1, 1)
+    query: data.test
+    error: "`bits.lsh` expects 2 arguments"
+
+  - note: bits.lsh.error.lessarg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.lsh(1)
+    query: data.test
+    error: "`bits.lsh` expects 2 arguments"
+
+  - note: bits.lsh
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.lsh(9, 2)
+    query: data.test
+    want_result:
+      x : 36
diff --git a/tests/interpreter/cases/builtins/bitwise/negate.yaml b/tests/interpreter/cases/builtins/bitwise/negate.yaml
new file mode 100644
index 00000000..7674b2c3
--- /dev/null
+++ b/tests/interpreter/cases/builtins/bitwise/negate.yaml
@@ -0,0 +1,40 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+cases:
+  - note: bits.negate.error.wrongtype
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.negate("str")
+    query: data.test
+    error: "`bits.negate` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.negate.error.morearg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.negate(1, 1)
+    query: data.test
+    error: "`bits.negate` expects 1 argument"
+
+  - note: bits.negate
+    data: {}
+    modules:
+      - |
+        package test
+
+        x1 = bits.negate(1)
+        x2 = bits.negate(0)
+        x3 = bits.negate(9)
+        x4 = bits.negate(-50)
+    query: data.test
+    want_result:
+      x1 : -2
+      x2 : -1
+      x3 : -10
+      x4 : 49
diff --git a/tests/interpreter/cases/builtins/bitwise/or.yaml b/tests/interpreter/cases/builtins/bitwise/or.yaml
new file mode 100644
index 00000000..9d7f3cca
--- /dev/null
+++ b/tests/interpreter/cases/builtins/bitwise/or.yaml
@@ -0,0 +1,60 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+cases:
+  - note: bits.or.error.wrongtype1
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.or(1, "str")
+    query: data.test
+    error: "`bits.or` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.or.error.wrongtype2
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.or("str", 1)
+    query: data.test
+    error: "`bits.or` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.or.error.morearg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.or(1, 1, 1)
+    query: data.test
+    error: "`bits.or` expects 2 arguments"
+
+  - note: bits.or.error.lessarg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.or(1)
+    query: data.test
+    error: "`bits.or` expects 2 arguments"
+
+  - note: bits.or
+    data: {}
+    modules:
+      - |
+        package test
+
+        x1 = bits.or(1, 0)
+        x2 = bits.or(1, 1)
+        x3 = bits.or(0, 0)
+        x4 = bits.or(0, 1)
+    query: data.test
+    want_result:
+      x1 : 1
+      x2 : 1
+      x3 : 0
+      x4 : 1
diff --git a/tests/interpreter/cases/builtins/bitwise/rsh.yaml b/tests/interpreter/cases/builtins/bitwise/rsh.yaml
new file mode 100644
index 00000000..e2ada847
--- /dev/null
+++ b/tests/interpreter/cases/builtins/bitwise/rsh.yaml
@@ -0,0 +1,54 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+cases:
+  - note: bits.rsh.error.wrongtype1
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.rsh(1, "str")
+    query: data.test
+    error: "`bits.rsh` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.rsh.error.wrongtype2
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.rsh("str", 1)
+    query: data.test
+    error: "`bits.rsh` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.rsh.error.morearg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.rsh(1, 1, 1)
+    query: data.test
+    error: "`bits.rsh` expects 2 arguments"
+
+  - note: bits.rsh.error.lessarg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.rsh(1)
+    query: data.test
+    error: "`bits.rsh` expects 2 arguments"
+
+  - note: bits.rsh
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.rsh(9, 2)
+    query: data.test
+    want_result:
+      x : 2
diff --git a/tests/interpreter/cases/builtins/bitwise/xor.yaml b/tests/interpreter/cases/builtins/bitwise/xor.yaml
new file mode 100644
index 00000000..b1e51d30
--- /dev/null
+++ b/tests/interpreter/cases/builtins/bitwise/xor.yaml
@@ -0,0 +1,60 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+cases:
+  - note: bits.xor.error.wrongtype1
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.xor(1, "str")
+    query: data.test
+    error: "`bits.xor` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.xor.error.wrongtype2
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.xor("str", 1)
+    query: data.test
+    error: "`bits.xor` expects numeric argument. Got `\"str\"` instead"
+
+  - note: bits.xor.error.morearg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.xor(1, 1, 1)
+    query: data.test
+    error: "`bits.xor` expects 2 arguments"
+
+  - note: bits.xor.error.lessarg
+    data: {}
+    modules:
+      - |
+        package test
+
+        x = bits.xor(1)
+    query: data.test
+    error: "`bits.xor` expects 2 arguments"
+
+  - note: bits.xor
+    data: {}
+    modules:
+      - |
+        package test
+
+        x1 = bits.xor(1, 0)
+        x2 = bits.xor(1, 1)
+        x3 = bits.xor(0, 0)
+        x4 = bits.xor(0, 1)
+    query: data.test
+    want_result:
+      x1 : 1
+      x2 : 0
+      x3 : 0
+      x4 : 1