diff --git a/sdks/android/Mentat/library/src/main/java/org/mozilla/mentat/JNA.java b/sdks/android/Mentat/library/src/main/java/org/mozilla/mentat/JNA.java
index 44ac12c2..83a03608 100644
--- a/sdks/android/Mentat/library/src/main/java/org/mozilla/mentat/JNA.java
+++ b/sdks/android/Mentat/library/src/main/java/org/mozilla/mentat/JNA.java
@@ -43,6 +43,7 @@ public interface JNA extends Library {
     class EntityBuilder extends PointerType {}
 
     Store store_open(String dbPath, RustError.ByReference err);
+    Store store_open_named_in_memory_store(String name, RustError.ByReference err);
 
     void destroy(Pointer obj);
     void uuid_destroy(Pointer obj);
diff --git a/sdks/android/Mentat/library/src/main/java/org/mozilla/mentat/Mentat.java b/sdks/android/Mentat/library/src/main/java/org/mozilla/mentat/Mentat.java
index 90e7c4fc..5f700a8e 100644
--- a/sdks/android/Mentat/library/src/main/java/org/mozilla/mentat/Mentat.java
+++ b/sdks/android/Mentat/library/src/main/java/org/mozilla/mentat/Mentat.java
@@ -28,7 +28,7 @@ public class Mentat extends RustObject<JNA.Store> {
     private Mentat(JNA.Store rawPointer) { super(rawPointer); }
 
     /**
-     * Open a connection to an in-memory Mentat Store.
+     * Open a connection to an anonymous in-memory Store.
      */
     public static Mentat open() {
         return open("");
@@ -51,6 +51,16 @@ public class Mentat extends RustObject<JNA.Store> {
         return new Mentat(store);
     }
 
+    /**
+     * Open a connection to a named in-memory Store.
+     * @param name    The named to be given to the in memory store to open.
+     * @return  An instance of Mentat connected to a named in memory store.
+     */
+    public static Mentat namedInMemoryStore(String name) {
+        RustError.ByReference err = new RustError.ByReference();
+        return new Mentat(JNA.INSTANCE.store_open_named_in_memory_store(name, err));
+    }
+
     /**
      * Add an attribute to the cache. The {@link CacheDirection} determines how that attribute can be
      * looked up.
diff --git a/sdks/android/Mentat/library/src/test/java/org/mozilla/mentat/FFIIntegrationTest.java b/sdks/android/Mentat/library/src/test/java/org/mozilla/mentat/FFIIntegrationTest.java
index f9f75408..9a3dfa46 100644
--- a/sdks/android/Mentat/library/src/test/java/org/mozilla/mentat/FFIIntegrationTest.java
+++ b/sdks/android/Mentat/library/src/test/java/org/mozilla/mentat/FFIIntegrationTest.java
@@ -116,9 +116,9 @@ public class FFIIntegrationTest {
         return mentat.transact(seattleData);
     }
 
-    public Mentat openAndInitializeCitiesStore() {
+    public Mentat openAndInitializeCitiesStore(String name) {
         if (this.mentat == null) {
-            this.mentat = Mentat.open();
+            this.mentat = Mentat.namedInMemoryStore(name);
             this.transactCitiesSchema(mentat);
             this.transactSeattleData(mentat);
         }
@@ -181,7 +181,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void transactingVocabularySucceeds() {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("transactingVocabularySucceeds");
         TxReport schemaReport = this.transactCitiesSchema(mentat);
         assertNotNull(schemaReport);
         assertTrue(schemaReport.getTxId() > 0);
@@ -189,7 +189,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void transactingEntitiesSucceeds() {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("transactingEntitiesSucceeds");
         this.transactCitiesSchema(mentat);
         TxReport dataReport = this.transactSeattleData(mentat);
         assertNotNull(dataReport);
@@ -200,7 +200,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void runScalarSucceeds() throws InterruptedException {
-        Mentat mentat = openAndInitializeCitiesStore();
+        Mentat mentat = openAndInitializeCitiesStore("runScalarSucceeds");
         String query = "[:find ?n . :in ?name :where [(fulltext $ :community/name ?name) [[?e ?n]]]]";
         final CountDownLatch expectation = new CountDownLatch(1);
         mentat.query(query).bind("?name", "Wallingford").run(new ScalarResultHandler() {
@@ -216,7 +216,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void runCollSucceeds() throws InterruptedException {
-        Mentat mentat = openAndInitializeCitiesStore();
+        Mentat mentat = openAndInitializeCitiesStore("runCollSucceeds");
         String query = "[:find [?when ...] :where [_ :db/txInstant ?when] :order (asc ?when)]";
         final CountDownLatch expectation = new CountDownLatch(1);
         mentat.query(query).run(new CollResultHandler() {
@@ -234,7 +234,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void runCollResultIteratorSucceeds() throws InterruptedException {
-        Mentat mentat = openAndInitializeCitiesStore();
+        Mentat mentat = openAndInitializeCitiesStore("runCollResultIteratorSucceeds");
         String query = "[:find [?when ...] :where [_ :db/txInstant ?when] :order (asc ?when)]";
         final CountDownLatch expectation = new CountDownLatch(1);
         mentat.query(query).run(new CollResultHandler() {
@@ -253,7 +253,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void runTupleSucceeds() throws InterruptedException {
-        Mentat mentat = openAndInitializeCitiesStore();
+        Mentat mentat = openAndInitializeCitiesStore("runTupleSucceeds");
         String query = "[:find [?name ?cat]\n" +
                 "        :where\n" +
                 "        [?c :community/name ?name]\n" +
@@ -276,7 +276,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void runRelIteratorSucceeds() throws InterruptedException {
-        Mentat mentat = openAndInitializeCitiesStore();
+        Mentat mentat = openAndInitializeCitiesStore("runRelIteratorSucceeds");
         String query = "[:find ?name ?cat\n" +
                 "        :where\n" +
                 "        [?c :community/name ?name]\n" +
@@ -313,7 +313,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void runRelSucceeds() throws InterruptedException {
-        Mentat mentat = openAndInitializeCitiesStore();
+        Mentat mentat = openAndInitializeCitiesStore("runRelSucceeds");
         String query = "[:find ?name ?cat\n" +
                 "        :where\n" +
                 "        [?c :community/name ?name]\n" +
@@ -349,7 +349,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void bindingLongValueSucceeds() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("bindingLongValueSucceeds");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?e . :in ?long :where [?e :foo/long ?long]]";
@@ -367,7 +367,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void bindingRefValueSucceeds() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("bindingRefValueSucceeds");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         long stringEntid = mentat.entIdForAttribute(":foo/string");
         final Long bEntid = report.getEntidForTempId("b");
@@ -386,7 +386,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void bindingRefKwValueSucceeds() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("bindingRefKwValueSucceeds");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         String refKeyword = ":foo/string";
         final Long bEntid = report.getEntidForTempId("b");
@@ -405,7 +405,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void bindingKwValueSucceeds() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("bindingKwValueSucceeds");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?e . :in ?kw :where [?e :foo/keyword ?kw]]";
@@ -422,8 +422,8 @@ public class FFIIntegrationTest {
     }
 
     @Test
-    public void bindingDateValueSucceeds() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+    public void bindingDateValueSucceeds() throws InterruptedException, ParseException {
+        Mentat mentat = Mentat.namedInMemoryStore("bindingDateValueSucceeds");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
 
@@ -445,7 +445,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void bindingStringValueSucceeds() throws InterruptedException {
-        Mentat mentat = this.openAndInitializeCitiesStore();
+        Mentat mentat = this.openAndInitializeCitiesStore("bindingStringValueSucceeds");
         String query = "[:find ?n . :in ?name :where [(fulltext $ :community/name ?name) [[?e ?n]]]]";
         final CountDownLatch expectation = new CountDownLatch(1);
         mentat.query(query).bind("?name", "Wallingford").run(new ScalarResultHandler() {
@@ -461,7 +461,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void bindingUuidValueSucceeds() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("bindingUuidValueSucceeds");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?e . :in ?uuid :where [?e :foo/uuid ?uuid]]";
@@ -480,7 +480,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void bindingBooleanValueSucceeds() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("bindingBooleanValueSucceeds");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?e . :in ?bool :where [?e :foo/boolean ?bool]]";
@@ -499,7 +499,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void bindingDoubleValueSucceeds() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("bindingDoubleValueSucceeds");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?e . :in ?double :where [?e :foo/double ?double]]";
@@ -517,7 +517,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void typedValueConvertsToLong() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("typedValueConvertsToLong");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?v . :in ?e :where [?e :foo/long ?v]]";
@@ -536,7 +536,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void typedValueConvertsToRef() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("typedValueConvertsToRef");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?e . :where [?e :foo/long 25]]";
@@ -555,7 +555,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void typedValueConvertsToKeyword() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("typedValueConvertsToKeyword");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?v . :in ?e :where [?e :foo/keyword ?v]]";
@@ -574,7 +574,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void typedValueConvertsToBoolean() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("typedValueConvertsToBoolean");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?v . :in ?e :where [?e :foo/boolean ?v]]";
@@ -593,7 +593,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void typedValueConvertsToDouble() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("typedValueConvertsToDouble");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?v . :in ?e :where [?e :foo/double ?v]]";
@@ -612,7 +612,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void typedValueConvertsToDate() throws InterruptedException, ParseException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("typedValueConvertsToDate");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?v . :in ?e :where [?e :foo/instant ?v]]";
@@ -638,7 +638,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void typedValueConvertsToString() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("typedValueConvertsToString");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?v . :in ?e :where [?e :foo/string ?v]]";
@@ -657,7 +657,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void typedValueConvertsToUUID() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("typedValueConvertsToUUID");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         String query = "[:find ?v . :in ?e :where [?e :foo/uuid ?v]]";
@@ -676,8 +676,8 @@ public class FFIIntegrationTest {
     }
 
     @Test
-    public void valueForAttributeOfEntitySucceeds() {
-        Mentat mentat = Mentat.open();
+    public void valueForAttributeOfEntitySucceeds() throws InterruptedException {
+        Mentat mentat = Mentat.namedInMemoryStore("valueForAttributeOfEntitySucceeds");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         final Long aEntid = report.getEntidForTempId("a");
         TypedValue value = mentat.valueForAttributeOfEntity(":foo/long", aEntid);
@@ -695,7 +695,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void testInProgressTransact() {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("testInProgressTransact");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         assertNotNull(report);
 
@@ -703,7 +703,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void testInProgressRollback() {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("testInProgressRollback");
         TxReport report = this.populateWithTypesSchema(mentat).dataReport;
         assertNotNull(report);
         long aEntid = report.getEntidForTempId("a");
@@ -721,7 +721,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void testInProgressEntityBuilder() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("testInProgressEntityBuilder");
         DBSetupResult reports = this.populateWithTypesSchema(mentat);
         long bEntid = reports.dataReport.getEntidForTempId("b");
         final long longEntid = reports.schemaReport.getEntidForTempId("l");
@@ -795,7 +795,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void testEntityBuilderForEntid() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("testEntityBuilderForEntid");
         DBSetupResult reports = this.populateWithTypesSchema(mentat);
         long bEntid = reports.dataReport.getEntidForTempId("b");
         final long longEntid = reports.schemaReport.getEntidForTempId("l");
@@ -869,7 +869,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void testEntityBuilderForTempid() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("testEntityBuilderForTempid");
         DBSetupResult reports = this.populateWithTypesSchema(mentat);
         final long longEntid = reports.schemaReport.getEntidForTempId("l");
 
@@ -922,7 +922,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void testInProgressBuilderTransact() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("testInProgressBuilderTransact");
         DBSetupResult reports = this.populateWithTypesSchema(mentat);
         long aEntid = reports.dataReport.getEntidForTempId("a");
         long bEntid = reports.dataReport.getEntidForTempId("b");
@@ -984,7 +984,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void testEntityBuilderTransact() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("testEntityBuilderTransact");
         DBSetupResult reports = this.populateWithTypesSchema(mentat);
         long aEntid = reports.dataReport.getEntidForTempId("a");
         long bEntid = reports.dataReport.getEntidForTempId("b");
@@ -1047,7 +1047,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void testEntityBuilderRetract() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("testEntityBuilderRetract");
         DBSetupResult reports = this.populateWithTypesSchema(mentat);
         long bEntid = reports.dataReport.getEntidForTempId("b");
         final long longEntid = reports.schemaReport.getEntidForTempId("l");
@@ -1111,7 +1111,7 @@ public class FFIIntegrationTest {
 
     @Test
     public void testInProgressBuilderRetract() throws InterruptedException {
-        Mentat mentat = Mentat.open();
+        Mentat mentat = Mentat.namedInMemoryStore("testInProgressBuilderRetract");
         DBSetupResult reports = this.populateWithTypesSchema(mentat);
         long bEntid = reports.dataReport.getEntidForTempId("b");
         final long longEntid = reports.schemaReport.getEntidForTempId("l");
@@ -1180,7 +1180,7 @@ public class FFIIntegrationTest {
                 "    [?neighborhood :neighborhood/district ?d]\n" +
                 "    [?d :district/name ?district]]";
 
-        Mentat mentat = openAndInitializeCitiesStore();
+        Mentat mentat = openAndInitializeCitiesStore("testCaching");
 
         final CountDownLatch expectation1 = new CountDownLatch(1);
         final QueryTimer uncachedTimer = new QueryTimer();
diff --git a/sdks/swift/Mentat/Mentat/Mentat.swift b/sdks/swift/Mentat/Mentat/Mentat.swift
index 712bcf4b..5aad1f66 100644
--- a/sdks/swift/Mentat/Mentat/Mentat.swift
+++ b/sdks/swift/Mentat/Mentat/Mentat.swift
@@ -61,6 +61,17 @@ open class Mentat: RustObject {
     public class func open(storeURI: String = "") throws -> Mentat {
         return Mentat(raw: try RustError.unwrap({err in store_open(storeURI, err) }))
     }
+    
+    /**
+     Open a connection to a Store in a given location.
+     If the store does not already exist, one will be created.
+     
+     - Parameter storeURI: The URI as a String of the store to open.
+     If no store URI is provided, an in-memory store will be opened.
+     */
+    public convenience init(namedInMemoryStore name: String) throws {
+        self.init(raw: try RustError.unwrap({err in store_open_named_in_memory_store(name, err) }))
+    }
 
     /**
      Add an attribute to the cache. The {@link CacheDirection} determines how that attribute can be
diff --git a/sdks/swift/Mentat/Mentat/store.h b/sdks/swift/Mentat/Mentat/store.h
index 729875f6..7c48e399 100644
--- a/sdks/swift/Mentat/Mentat/store.h
+++ b/sdks/swift/Mentat/Mentat/store.h
@@ -103,6 +103,7 @@ typedef NS_ENUM(NSInteger, ValueType) {
 
 // Store
 struct Store*_Nonnull store_open(const char*_Nonnull uri, struct RustError* _Nonnull error);
+struct Store*_Nonnull store_open_named_in_memory_store(const char*_Nonnull name, struct RustError* _Nonnull error);
 
 // Destructors.
 void destroy(void* _Nullable obj);
diff --git a/sdks/swift/Mentat/MentatTests/MentatTests.swift b/sdks/swift/Mentat/MentatTests/MentatTests.swift
index 25a59378..4c16f5f9 100644
--- a/sdks/swift/Mentat/MentatTests/MentatTests.swift
+++ b/sdks/swift/Mentat/MentatTests/MentatTests.swift
@@ -32,6 +32,11 @@ class MentatTests: XCTestCase {
     func testOpenInMemoryStore() {
         XCTAssertNotNil(try Mentat.open().raw)
     }
+    
+    // test that a store can be opened in memory
+    func testOpenNamedInMemoryStore() {
+        XCTAssertNotNil(try Mentat(namedInMemoryStore: "testOpenInMemoryStore").raw)
+    }
 
     // test that a store can be opened in a specific location
     func testOpenStoreInLocation() {
@@ -77,9 +82,9 @@ class MentatTests: XCTestCase {
         return report
     }
 
-    func openAndInitializeCitiesStore() -> Mentat {
+    func openAndInitializeCitiesStore() throws -> Mentat {
         guard let mentat = self.store else {
-            let mentat = try! Mentat.open()
+            let mentat = try Mentat(namedInMemoryStore: "openAndInitializeCitiesStore")
             let _ = try! self.transactCitiesSchema(mentat: mentat)
             let _ = try! self.transactSeattleData(mentat: mentat)
             self.store = mentat
@@ -153,7 +158,7 @@ class MentatTests: XCTestCase {
 
     func test1TransactVocabulary() {
         do {
-            let mentat = try Mentat.open()
+            let mentat = try Mentat(namedInMemoryStore: "test1TransactVocabulary")
             let vocab = try readCitiesSchema()
             let report = try mentat.transact(transaction: vocab)
             XCTAssertNotNil(report)
@@ -165,7 +170,7 @@ class MentatTests: XCTestCase {
 
     func test2TransactEntities() {
         do {
-            let mentat = try Mentat.open()
+            let mentat = try Mentat(namedInMemoryStore: "test2TransactEntities")
             let vocab = try readCitiesSchema()
             let _ = try mentat.transact(transaction: vocab)
             let data = try readSeattleData()
@@ -179,8 +184,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testQueryScalar() {
-        let mentat = openAndInitializeCitiesStore()
+    func testQueryScalar() throws {
+        let mentat = try openAndInitializeCitiesStore()
         let query = "[:find ?n . :in ?name :where [(fulltext $ :community/name ?name) [[?e ?n]]]]"
         let expect = expectation(description: "Query is executed")
         XCTAssertNoThrow(try mentat.query(query: query).bind(varName: "?name", toString: "Wallingford").runScalar(callback: { scalarResult in
@@ -197,8 +202,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testQueryColl() {
-        let mentat = openAndInitializeCitiesStore()
+    func testQueryColl() throws {
+        let mentat = try openAndInitializeCitiesStore()
         let query = "[:find [?when ...] :where [_ :db/txInstant ?when] :order (asc ?when)]"
         let expect = expectation(description: "Query is executed")
         XCTAssertNoThrow(try mentat.query(query: query).runColl(callback: { collResult in
@@ -219,8 +224,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testQueryCollResultIterator() {
-        let mentat = openAndInitializeCitiesStore()
+    func testQueryCollResultIterator() throws {
+        let mentat = try openAndInitializeCitiesStore()
         let query = "[:find [?when ...] :where [_ :db/txInstant ?when] :order (asc ?when)]"
         let expect = expectation(description: "Query is executed")
         XCTAssertNoThrow(try mentat.query(query: query).runColl(callback: { collResult in
@@ -240,8 +245,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testQueryTuple() {
-        let mentat = openAndInitializeCitiesStore()
+    func testQueryTuple() throws {
+        let mentat = try openAndInitializeCitiesStore()
         let query = """
         [:find [?name ?cat]
         :where
@@ -267,8 +272,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testQueryRel() {
-        let mentat = openAndInitializeCitiesStore()
+    func testQueryRel() throws {
+        let mentat = try openAndInitializeCitiesStore()
         let query = """
         [:find ?name ?cat
         :where
@@ -300,8 +305,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testQueryRelResultIterator() {
-        let mentat = openAndInitializeCitiesStore()
+    func testQueryRelResultIterator() throws {
+        let mentat = try openAndInitializeCitiesStore()
         let query = """
         [:find ?name ?cat
         :where
@@ -336,8 +341,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testBindLong() {
-        let mentat = try! Mentat.open()
+    func testBindLong() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testBindLong")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")
         let query = "[:find ?e . :in ?long :where [?e :foo/long ?long]]"
@@ -356,8 +361,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testBindRef() {
-        let mentat = try! Mentat.open()
+    func testBindRef() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testBindRef")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let stringEntid = mentat.entidForAttribute(attribute: ":foo/string")
         let bEntid = report!.entid(forTempId: "b")
@@ -377,8 +382,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testBindKwRef() {
-        let mentat = try! Mentat.open()
+    func testBindKwRef() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testBindKwRef")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let bEntid = report!.entid(forTempId: "b")
         let query = "[:find ?e . :in ?ref :where [?e :foo/ref ?ref]]"
@@ -397,8 +402,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testBindKw() {
-        let mentat = try! Mentat.open()
+    func testBindKw() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testBindKw")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")
         let query = "[:find ?e . :in ?kw :where [?e :foo/keyword ?kw]]"
@@ -417,8 +422,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testBindDate() {
-        let mentat = try! Mentat.open()
+    func testBindDate() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testBindDate")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")
         let query = "[:find [?e ?d] :in ?now :where [?e :foo/instant ?d] [(< ?d ?now)]]"
@@ -443,8 +448,8 @@ class MentatTests: XCTestCase {
     }
 
 
-    func testBindString() {
-        let mentat = openAndInitializeCitiesStore()
+    func testBindString() throws {
+        let mentat = try openAndInitializeCitiesStore()
         let query = "[:find ?n . :in ?name :where [(fulltext $ :community/name ?name) [[?e ?n]]]]"
         let expect = expectation(description: "Query is executed")
         XCTAssertNoThrow(try mentat.query(query: query)
@@ -463,8 +468,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testBindUuid() {
-        let mentat = try! Mentat.open()
+    func testBindUuid() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testBindUuid")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")
         let query = "[:find ?e . :in ?uuid :where [?e :foo/uuid ?uuid]]"
@@ -484,8 +489,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testBindBoolean() {
-        let mentat = try! Mentat.open()
+    func testBindBoolean() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testBindBoolean")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")
         let query = "[:find ?e . :in ?bool :where [?e :foo/boolean ?bool]]"
@@ -504,8 +509,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testBindDouble() {
-        let mentat = try! Mentat.open()
+    func testBindDouble() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testBindDouble")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")
         let query = "[:find ?e . :in ?double :where [?e :foo/double ?double]]"
@@ -524,8 +529,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testTypedValueAsLong() {
-        let mentat = try! Mentat.open()
+    func testTypedValueAsLong() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testTypedValueAsLong")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")!
         let query = "[:find ?v . :in ?e :where [?e :foo/long ?v]]"
@@ -545,8 +550,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testTypedValueAsRef() {
-        let mentat = try! Mentat.open()
+    func testTypedValueAsRef() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testTypedValueAsRef")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")!
         let query = "[:find ?e . :where [?e :foo/long 25]]"
@@ -565,8 +570,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testTypedValueAsKw() {
-        let mentat = try! Mentat.open()
+    func testTypedValueAsKw() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testTypedValueAsKw")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")!
         let query = "[:find ?v . :in ?e :where [?e :foo/keyword ?v]]"
@@ -586,8 +591,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testTypedValueAsBoolean() {
-        let mentat = try! Mentat.open()
+    func testTypedValueAsBoolean() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testTypedValueAsBoolean")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")!
         let query = "[:find ?v . :in ?e :where [?e :foo/boolean ?v]]"
@@ -607,8 +612,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testTypedValueAsDouble() {
-        let mentat = try! Mentat.open()
+    func testTypedValueAsDouble() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testTypedValueAsDouble")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")!
         let query = "[:find ?v . :in ?e :where [?e :foo/double ?v]]"
@@ -628,8 +633,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testTypedValueAsDate() {
-        let mentat = try! Mentat.open()
+    func testTypedValueAsDate() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testTypedValueAsDate")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")!
         let query = "[:find ?v . :in ?e :where [?e :foo/instant ?v]]"
@@ -654,8 +659,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testTypedValueAsString() {
-        let mentat = try! Mentat.open()
+    func testTypedValueAsString() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testTypedValueAsString")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")!
         let query = "[:find ?v . :in ?e :where [?e :foo/string ?v]]"
@@ -675,8 +680,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testTypedValueAsUuid() {
-        let mentat = try! Mentat.open()
+    func testTypedValueAsUuid() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testTypedValueAsUuid")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")!
         let query = "[:find ?v . :in ?e :where [?e :foo/uuid ?v]]"
@@ -697,8 +702,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testValueForAttributeOfEntity() {
-        let mentat = try! Mentat.open()
+    func testValueForAttributeOfEntity() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testValueForAttributeOfEntity")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = report!.entid(forTempId: "a")!
         var value: TypedValue? = nil;
@@ -707,15 +712,15 @@ class MentatTests: XCTestCase {
         assert(value?.asLong() == 25)
     }
 
-    func testEntidForAttribute() {
-        let mentat = try! Mentat.open()
+    func testEntidForAttribute() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testEntidForAttribute")
         let _ = self.populateWithTypesSchema(mentat: mentat)
         let entid = mentat.entidForAttribute(attribute: ":foo/long")
         assert(entid == 65540)
     }
 
-    func testMultipleQueries() {
-        let mentat = try! Mentat.open()
+    func testMultipleQueries() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testMultipleQueries")
         let _ = self.populateWithTypesSchema(mentat: mentat)
         let q1 = mentat.query(query: "[:find ?x :where [?x _ _]]")
 
@@ -739,8 +744,8 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func testNestedQueries() {
-        let mentat = try! Mentat.open()
+    func testNestedQueries() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testNestedQueries")
         let _ = self.populateWithTypesSchema(mentat: mentat)
         let q1 = mentat.query(query: "[:find ?x :where [?x _ _]]")
         let q2 = mentat.query(query: "[:find ?x :where [_ _ ?x]]")
@@ -761,14 +766,14 @@ class MentatTests: XCTestCase {
         }
     }
 
-    func test3InProgressTransact() {
-        let mentat = try! Mentat.open()
+    func test3InProgressTransact() throws {
+        let mentat = try Mentat(namedInMemoryStore: "test3InProgressTransact")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         XCTAssertNotNil(report)
     }
 
-    func testInProgressRollback() {
-        let mentat = try! Mentat.open()
+    func testInProgressRollback() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testInProgressRollback")
         let (_, report) = self.populateWithTypesSchema(mentat: mentat)
         XCTAssertNotNil(report)
         let aEntid = report!.entid(forTempId: "a")!
@@ -785,8 +790,8 @@ class MentatTests: XCTestCase {
 
     }
 
-    func testInProgressEntityBuilder() {
-        let mentat = try! Mentat.open()
+    func testInProgressEntityBuilder() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testInProgressEntityBuilder")
         let (schemaReport, dataReport) = self.populateWithTypesSchema(mentat: mentat)
         let bEntid = dataReport!.entid(forTempId: "b")!
         let longEntid = schemaReport!.entid(forTempId: "l")!
@@ -850,8 +855,8 @@ class MentatTests: XCTestCase {
        })
     }
 
-    func testEntityBuilderForEntid() {
-        let mentat = try! Mentat.open()
+    func testEntityBuilderForEntid() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testEntityBuilderForEntid")
         let (schemaReport, dataReport) = self.populateWithTypesSchema(mentat: mentat)
         let bEntid = dataReport!.entid(forTempId: "b")!
         let longEntid = schemaReport!.entid(forTempId: "l")!
@@ -915,8 +920,8 @@ class MentatTests: XCTestCase {
         })
     }
 
-    func testEntityBuilderForTempid() {
-        let mentat = try! Mentat.open()
+    func testEntityBuilderForTempid() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testEntityBuilderForTempid")
         let (schemaReport, _) = self.populateWithTypesSchema(mentat: mentat)
         let longEntid = schemaReport!.entid(forTempId: "l")!
         // test that the values are as expected
@@ -962,8 +967,8 @@ class MentatTests: XCTestCase {
         })
     }
 
-    func testInProgressBuilderTransact() {
-        let mentat = try! Mentat.open()
+    func testInProgressBuilderTransact() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testInProgressBuilderTransact")
         let (schemaReport, dataReport) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = dataReport!.entid(forTempId: "a")!
         let bEntid = dataReport!.entid(forTempId: "b")!
@@ -1018,8 +1023,8 @@ class MentatTests: XCTestCase {
         XCTAssertEqual(22, longValue?.asLong())
     }
 
-    func testEntityBuilderTransact() {
-        let mentat = try! Mentat.open()
+    func testEntityBuilderTransact() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testEntityBuilderTransact")
         let (schemaReport, dataReport) = self.populateWithTypesSchema(mentat: mentat)
         let aEntid = dataReport!.entid(forTempId: "a")!
         let bEntid = dataReport!.entid(forTempId: "b")!
@@ -1074,8 +1079,8 @@ class MentatTests: XCTestCase {
         XCTAssertEqual(22, longValue?.asLong())
     }
 
-    func testEntityBuilderRetract() {
-        let mentat = try! Mentat.open()
+    func testEntityBuilderRetract() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testEntityBuilderRetract")
         let (schemaReport, dataReport) = self.populateWithTypesSchema(mentat: mentat)
         let bEntid = dataReport!.entid(forTempId: "b")!
         let stringEntid = schemaReport!.entid(forTempId: "s")!
@@ -1124,8 +1129,8 @@ class MentatTests: XCTestCase {
         })
     }
 
-    func testInProgressEntityBuilderRetract() {
-        let mentat = try! Mentat.open()
+    func testInProgressEntityBuilderRetract() throws {
+        let mentat = try Mentat(namedInMemoryStore: "testInProgressEntityBuilderRetract")
         let (schemaReport, dataReport) = self.populateWithTypesSchema(mentat: mentat)
         let bEntid = dataReport!.entid(forTempId: "b")!
         let stringEntid = schemaReport!.entid(forTempId: "s")!
@@ -1174,7 +1179,7 @@ class MentatTests: XCTestCase {
         })
     }
 
-    func testCaching() {
+    func testCaching() throws {
         let query = """
                 [:find ?district :where
                 [?neighborhood :neighborhood/name \"Beacon Hill\"]
@@ -1182,7 +1187,7 @@ class MentatTests: XCTestCase {
                 [?d :district/name ?district]]
                 """
 
-        let mentat = openAndInitializeCitiesStore()
+        let mentat = try openAndInitializeCitiesStore()
 
         struct QueryTimer {
             private var _start: UInt64