diff --git a/tx-parser/src/lib.rs b/tx-parser/src/lib.rs
index 0cbc400c..050f4768 100644
--- a/tx-parser/src/lib.rs
+++ b/tx-parser/src/lib.rs
@@ -16,8 +16,7 @@ extern crate mentat_tx;
 
 use combine::{any, eof, many, optional, parser, satisfy_map, token, Parser, ParseResult, Stream};
 use combine::combinator::{Expected, FnParser};
-// TODO: understand why this is self::edn rather than just edn.
-use self::edn::types::Value;
+use edn::types::Value;
 use mentat_tx::entities::*;
 
 // TODO: implement combine::Positioner on Value.  We can't do this
@@ -45,7 +44,7 @@ use mentat_tx::entities::*;
 //     }
 // }
 
-struct Tx<I>(::std::marker::PhantomData<fn(I) -> I>);
+pub struct Tx<I>(::std::marker::PhantomData<fn(I) -> I>);
 
 type TxParser<O, I> = Expected<FnParser<I, fn(I) -> ParseResult<O, I>>>;
 
@@ -252,7 +251,7 @@ impl<I> Tx<I>
         p.parse_stream(input)
     }
 
-    fn entity() -> TxParser<Entity, I> {
+    pub fn entity() -> TxParser<Entity, I> {
         fn_parser(Tx::<I>::entity_,
                   "[:db/add|:db/retract|:db/retractAttribute|:db/retractEntity ...]")
     }
@@ -274,105 +273,8 @@ impl<I> Tx<I>
             .parse_stream(input);
     }
 
-    fn entities() -> TxParser<Vec<Entity>, I> {
+    pub fn entities() -> TxParser<Vec<Entity>, I> {
         fn_parser(Tx::<I>::entities_,
                   "[[:db/add|:db/retract|:db/retractAttribute|:db/retractEntity ...]*]")
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_add() {
-        let input = [Value::Vector(vec![Value::Keyword("db/add".into()),
-                                        Value::Keyword("ident".into()),
-                                        Value::Keyword("a".into()),
-                                        Value::Text("v".into())])];
-        let mut parser = Tx::entity();
-        let result = parser.parse(&input[..]);
-        assert_eq!(result,
-                   Ok((Entity::Add {
-                       e: EntIdOrLookupRef::EntId(EntId::Ident("ident".into())),
-                       a: EntId::Ident("a".into()),
-                       v: ValueOrLookupRef::Value(Value::Text("v".into())),
-                       tx: None,
-                   },
-                       &[][..])));
-    }
-
-    #[test]
-    fn test_retract() {
-        let input = [Value::Vector(vec![Value::Keyword("db/retract".into()),
-                                        Value::Integer(101),
-                                        Value::Keyword("a".into()),
-                                        Value::Text("v".into())])];
-        let mut parser = Tx::entity();
-        let result = parser.parse(&input[..]);
-        assert_eq!(result,
-                   Ok((Entity::Retract {
-                       e: EntIdOrLookupRef::EntId(EntId::EntId(101)),
-                       a: EntId::Ident("a".into()),
-                       v: ValueOrLookupRef::Value(Value::Text("v".into())),
-                   },
-                       &[][..])));
-    }
-
-    #[test]
-    fn test_entities() {
-        let input = [Value::Vector(vec![
-            Value::Vector(vec![Value::Keyword("db/add".into()),
-                               Value::Integer(101),
-                               Value::Keyword("a".into()),
-                               Value::Text("v".into())]),
-            Value::Vector(vec![Value::Keyword("db/retract".into()),
-                               Value::Integer(102),
-                               Value::Keyword("b".into()),
-                               Value::Text("w".into())])])];
-
-        let mut parser = Tx::entities();
-        let result = parser.parse(&input[..]);
-        assert_eq!(result,
-                   Ok((vec![
-                       Entity::Add {
-                           e: EntIdOrLookupRef::EntId(EntId::EntId(101)),
-                           a: EntId::Ident("a".into()),
-                           v: ValueOrLookupRef::Value(Value::Text("v".into())),
-                           tx: None,
-                       },
-                       Entity::Retract {
-                           e: EntIdOrLookupRef::EntId(EntId::EntId(102)),
-                           a: EntId::Ident("b".into()),
-                           v: ValueOrLookupRef::Value(Value::Text("w".into())),
-                       },
-                       ],
-                       &[][..])));
-    }
-    
-    #[test]
-    fn test_lookup_ref() {
-        let input = [Value::Vector(vec![Value::Keyword("db/add".into()),
-                                        Value::Vector(vec![Value::Keyword("a1".into()),
-                                                           Value::Text("v1".into())]),
-                                        Value::Keyword("a".into()),
-                                        Value::Text("v".into())])];
-        let mut parser = Tx::entity();
-        let result = parser.parse(&input[..]);
-        assert_eq!(result,
-                   Ok((Entity::Add {
-                       e: EntIdOrLookupRef::LookupRef(LookupRef {
-                           a: EntId::Ident("a1".into()),
-                           v: Value::Text("v1".into()),
-                       }),
-                       a: EntId::Ident("a".into()),
-                       v: ValueOrLookupRef::Value(Value::Text("v".into())),
-                       tx: None,
-                   },
-                       &[][..])));
-    }
-
-    // TODO: test error handling in select cases.  It's tricky to do
-    // this without combine::Positioner; see the TODO at the top of
-    // the file.
-}
diff --git a/tx-parser/tests/parser.rs b/tx-parser/tests/parser.rs
new file mode 100644
index 00000000..98ac039d
--- /dev/null
+++ b/tx-parser/tests/parser.rs
@@ -0,0 +1,112 @@
+// Copyright 2016 Mozilla
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License. You may obtain a copy of the
+// License at http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations under the License.
+
+extern crate edn;
+extern crate combine;
+extern crate mentat_tx;
+extern crate mentat_tx_parser;
+
+use combine::Parser;
+use edn::types::Value;
+use mentat_tx::entities::*;
+use mentat_tx_parser::Tx;
+
+#[test]
+fn test_add() {
+    let input = [Value::Vector(vec![Value::Keyword("db/add".into()),
+                                    Value::Keyword("ident".into()),
+                                    Value::Keyword("a".into()),
+                                    Value::Text("v".into())])];
+    let mut parser = Tx::entity();
+    let result = parser.parse(&input[..]);
+    assert_eq!(result,
+               Ok((Entity::Add {
+                   e: EntIdOrLookupRef::EntId(EntId::Ident("ident".into())),
+                   a: EntId::Ident("a".into()),
+                   v: ValueOrLookupRef::Value(Value::Text("v".into())),
+                   tx: None,
+               },
+                   &[][..])));
+}
+
+#[test]
+fn test_retract() {
+    let input = [Value::Vector(vec![Value::Keyword("db/retract".into()),
+                                    Value::Integer(101),
+                                    Value::Keyword("a".into()),
+                                    Value::Text("v".into())])];
+    let mut parser = Tx::entity();
+    let result = parser.parse(&input[..]);
+    assert_eq!(result,
+               Ok((Entity::Retract {
+                   e: EntIdOrLookupRef::EntId(EntId::EntId(101)),
+                   a: EntId::Ident("a".into()),
+                   v: ValueOrLookupRef::Value(Value::Text("v".into())),
+               },
+                   &[][..])));
+}
+
+#[test]
+fn test_entities() {
+    let input = [Value::Vector(vec![
+        Value::Vector(vec![Value::Keyword("db/add".into()),
+                           Value::Integer(101),
+                           Value::Keyword("a".into()),
+                           Value::Text("v".into())]),
+        Value::Vector(vec![Value::Keyword("db/retract".into()),
+                           Value::Integer(102),
+                           Value::Keyword("b".into()),
+                           Value::Text("w".into())])])];
+
+    let mut parser = Tx::entities();
+    let result = parser.parse(&input[..]);
+    assert_eq!(result,
+               Ok((vec![
+                   Entity::Add {
+                       e: EntIdOrLookupRef::EntId(EntId::EntId(101)),
+                       a: EntId::Ident("a".into()),
+                       v: ValueOrLookupRef::Value(Value::Text("v".into())),
+                       tx: None,
+                   },
+                   Entity::Retract {
+                       e: EntIdOrLookupRef::EntId(EntId::EntId(102)),
+                       a: EntId::Ident("b".into()),
+                       v: ValueOrLookupRef::Value(Value::Text("w".into())),
+                   },
+                   ],
+                   &[][..])));
+}
+
+#[test]
+fn test_lookup_ref() {
+    let input = [Value::Vector(vec![Value::Keyword("db/add".into()),
+                                    Value::Vector(vec![Value::Keyword("a1".into()),
+                                                       Value::Text("v1".into())]),
+                                    Value::Keyword("a".into()),
+                                    Value::Text("v".into())])];
+    let mut parser = Tx::entity();
+    let result = parser.parse(&input[..]);
+    assert_eq!(result,
+               Ok((Entity::Add {
+                   e: EntIdOrLookupRef::LookupRef(LookupRef {
+                       a: EntId::Ident("a1".into()),
+                       v: Value::Text("v1".into()),
+                   }),
+                   a: EntId::Ident("a".into()),
+                   v: ValueOrLookupRef::Value(Value::Text("v".into())),
+                   tx: None,
+               },
+                   &[][..])));
+}
+
+// TODO: test error handling in select cases.  It's tricky to do
+// this without combine::Positioner; see the TODO at the top of
+// the file.
+