diff --git a/Bluepill-cli/BPInstanceTests/BPTestHelper.h b/Bluepill-cli/BPInstanceTests/BPTestHelper.h
index aa8cf1f2..2f4c33ed 100644
--- a/Bluepill-cli/BPInstanceTests/BPTestHelper.h
+++ b/Bluepill-cli/BPInstanceTests/BPTestHelper.h
@@ -53,6 +53,9 @@
 // Return the sample photo path.
 + (NSString *)samplePhotoPath;
 
+// Return the sample script path.
++ (NSString *)sampleScriptPath;
+
 // Return the path to the Debug iphone-simulator folder
 + (NSString *)debugIphoneSimulatorPath;
 
diff --git a/Bluepill-cli/BPInstanceTests/BPTestHelper.m b/Bluepill-cli/BPInstanceTests/BPTestHelper.m
index c508ade9..037042d8 100644
--- a/Bluepill-cli/BPInstanceTests/BPTestHelper.m
+++ b/Bluepill-cli/BPInstanceTests/BPTestHelper.m
@@ -64,6 +64,10 @@ + (NSString *)samplePhotoPath {
     return [[[NSBundle bundleForClass:[self class]] resourcePath] stringByAppendingPathComponent:@"image.png"];
 }
 
++ (NSString *)sampleScriptPath {
+    return [[[NSBundle bundleForClass:[self class]] resourcePath] stringByAppendingPathComponent:@"test-script.sh"];
+}
+
 + (NSString *)bpExecutablePath {
     return [[self debugMacOSPath] stringByAppendingPathComponent:@"bp"];
 }
diff --git a/Bluepill-cli/BPInstanceTests/BluepillTests.m b/Bluepill-cli/BPInstanceTests/BluepillTests.m
index 87ac7f6b..dc207e84 100644
--- a/Bluepill-cli/BPInstanceTests/BluepillTests.m
+++ b/Bluepill-cli/BPInstanceTests/BluepillTests.m
@@ -477,6 +477,38 @@ - (void)testCopySimulatorPreferencesFile {
     XCTAssert([[NSDictionary alloc] initWithContentsOfURL:preferencesFile] == nil);
 }
 
+- (void)testRunScript {
+    self.config.scriptFilePath = [BPTestHelper sampleScriptPath];
+
+    NSString *testBundlePath = [BPTestHelper sampleAppBalancingTestsBundlePath];
+    self.config.testBundlePath = testBundlePath;
+    self.config.keepSimulator = YES;
+
+    Bluepill *bp = [[Bluepill alloc ] initWithConfiguration:self.config];
+    BPExitStatus exitCode = [bp run];
+    XCTAssert(exitCode == BPExitStatusTestsAllPassed);
+    XCTAssertNotNil(bp.test_simulatorUDID);
+
+    NSString *devicePath = bp.test_simulator.device.devicePath;
+    NSString *deviceID = bp.test_simulator.device.UDID.UUIDString;
+
+    // The test script will create $(DEVICE_ID).txt in the device path
+    NSString *testFile = [NSString stringWithFormat:@"%@/%@.txt", devicePath, deviceID];
+    XCTAssertTrue([[NSFileManager defaultManager] fileExistsAtPath:testFile]);
+
+    self.config.deleteSimUDID = bp.test_simulatorUDID;
+    XCTAssertNotNil(self.config.deleteSimUDID);
+
+    Bluepill *bp2 = [[Bluepill alloc ] initWithConfiguration:self.config];
+    BPExitStatus exitCode2 = [bp2 run];
+    XCTAssert(exitCode2 == BPExitStatusSimulatorDeleted);
+    XCTAssertEqualObjects(self.config.deleteSimUDID, bp2.test_simulatorUDID);
+
+    if ([[NSFileManager defaultManager] fileExistsAtPath:testFile]) {
+        [[NSFileManager defaultManager] removeItemAtPath:testFile error:nil];
+        XCTFail(@"%@ was not deleted when the simulator was deleted", testFile);
+    }
+}
 
 - (void)testThatScreenshotAreNotTakenWithFailingTestsSetWithoutConfigOption {
     NSString *tempDir = NSTemporaryDirectory();
diff --git a/Bluepill-cli/BPInstanceTests/Resource Files/test-script.sh b/Bluepill-cli/BPInstanceTests/Resource Files/test-script.sh
new file mode 100755
index 00000000..ff7aabd6
--- /dev/null
+++ b/Bluepill-cli/BPInstanceTests/Resource Files/test-script.sh	
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+# This is a script to test --script-file
+
+touch "$BP_DEVICE_PATH/$BP_DEVICE_ID.txt"
diff --git a/Bluepill-cli/Bluepill-cli.xcodeproj/project.pbxproj b/Bluepill-cli/Bluepill-cli.xcodeproj/project.pbxproj
index 8c24b0b7..34530902 100644
--- a/Bluepill-cli/Bluepill-cli.xcodeproj/project.pbxproj
+++ b/Bluepill-cli/Bluepill-cli.xcodeproj/project.pbxproj
@@ -73,6 +73,7 @@
 		B3DAF83C2151CB4100210286 /* BPDeleteSimulatorHandler.m in Sources */ = {isa = PBXBuildFile; fileRef = 7A7E7BBB1DF21749007928F3 /* BPDeleteSimulatorHandler.m */; };
 		B3DAF83D2151CB7000210286 /* BPHandler.m in Sources */ = {isa = PBXBuildFile; fileRef = 7A7E7BAF1DF2066B007928F3 /* BPHandler.m */; };
 		B3DAF83E2151CB9700210286 /* BPWaitTimer.m in Sources */ = {isa = PBXBuildFile; fileRef = 7ACE1F6E1DD397F800C0FA73 /* BPWaitTimer.m */; };
+		B848CF51217E39060043D826 /* test-script.sh in Resources */ = {isa = PBXBuildFile; fileRef = B848CF4F217E38FB0043D826 /* test-script.sh */; };
 		BA0096FE1DCA5D810000DD45 /* testConfigRelativePath.json in Resources */ = {isa = PBXBuildFile; fileRef = BA0096FD1DCA5D810000DD45 /* testConfigRelativePath.json */; };
 		BA0097001DCA61210000DD45 /* BPConfigurationTests.m in Sources */ = {isa = PBXBuildFile; fileRef = BA0096FF1DCA61210000DD45 /* BPConfigurationTests.m */; };
 		BA0C554D1DDAE241009E1377 /* failure_retry_report.xml in Resources */ = {isa = PBXBuildFile; fileRef = BA0C554C1DDAE241009E1377 /* failure_retry_report.xml */; };
@@ -192,6 +193,7 @@
 		B368E562213F8D2F00B4DEA3 /* bluelibTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = bluelibTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		B368E567213F8D2F00B4DEA3 /* bluelibTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = bluelibTests.m; sourceTree = "<group>"; };
 		B368E569213F8D2F00B4DEA3 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		B848CF4F217E38FB0043D826 /* test-script.sh */ = {isa = PBXFileReference; lastKnownFileType = text.script.sh; path = "test-script.sh"; sourceTree = "<group>"; };
 		BA0096FD1DCA5D810000DD45 /* testConfigRelativePath.json */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.json; path = testConfigRelativePath.json; sourceTree = "<group>"; };
 		BA0096FF1DCA61210000DD45 /* BPConfigurationTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BPConfigurationTests.m; sourceTree = "<group>"; };
 		BA0097011DCA626F0000DD45 /* BPConfiguration+Test.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "BPConfiguration+Test.h"; sourceTree = "<group>"; };
@@ -496,6 +498,7 @@
 				BA180A131DBB088100D7D130 /* testScheme.xcscheme */,
 				BA0096FD1DCA5D810000DD45 /* testConfigRelativePath.json */,
 				C94DEF7F8BCA7AB3C9114467 /* simulator-preferences.plist */,
+				B848CF4F217E38FB0043D826 /* test-script.sh */,
 			);
 			path = "Resource Files";
 			sourceTree = "<group>";
@@ -889,6 +892,7 @@
 				BA4BCFD11DC4888800592FA4 /* hanging_tests.xml in Resources */,
 				BA4800EA1DC2C74600026972 /* BPAppNegativeTests-results.xml in Resources */,
 				7A4FB8E61DF8AD4F0073F268 /* missed-crash.log in Resources */,
+				B848CF51217E39060043D826 /* test-script.sh in Resources */,
 				C94DE0BB4360016D3D3061D9 /* simulator-preferences.plist in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
diff --git a/Bluepill-cli/Bluepill-cli/Bluepill/Bluepill.m b/Bluepill-cli/Bluepill-cli/Bluepill/Bluepill.m
index 55e5f7b1..d193813f 100644
--- a/Bluepill-cli/Bluepill-cli/Bluepill/Bluepill.m
+++ b/Bluepill-cli/Bluepill-cli/Bluepill/Bluepill.m
@@ -282,6 +282,9 @@ - (void)createSimulatorWithContext:(BPExecutionContext *)context {
     };
 
     handler.onSuccess = ^{
+        if (self.config.scriptFilePath) {
+            [context.runner runScriptFile:self.config.scriptFilePath];
+        }
         if (self.config.cloneSimulator) {
             // launch application directly when clone simulator
             NEXT([__self launchApplicationWithContext:context]);
diff --git a/Bluepill-cli/Bluepill-cli/Simulator/BPSimulator.h b/Bluepill-cli/Bluepill-cli/Simulator/BPSimulator.h
index 9c98dfcf..e008bf87 100644
--- a/Bluepill-cli/Bluepill-cli/Simulator/BPSimulator.h
+++ b/Bluepill-cli/Bluepill-cli/Simulator/BPSimulator.h
@@ -48,6 +48,8 @@
 
 - (void)addVideosToSimulator;
 
+- (void)runScriptFile:(NSString *)scriptFilePath;
+
 /*!
  @discussion create template simulators and install the test hosts
  @param testBundles include the test hosts need to be installed.
diff --git a/Bluepill-cli/Bluepill-cli/Simulator/BPSimulator.m b/Bluepill-cli/Bluepill-cli/Simulator/BPSimulator.m
index 15944aa4..cd674eab 100644
--- a/Bluepill-cli/Bluepill-cli/Simulator/BPSimulator.m
+++ b/Bluepill-cli/Bluepill-cli/Simulator/BPSimulator.m
@@ -254,6 +254,26 @@ - (void)copySimulatorPreferencesFile:(NSString *)newPreferencesFile {
     }
 }
 
+- (void)runScriptFile:(NSString *)scriptFilePath {
+    NSTask *task = [[NSTask alloc] init];
+    [task setLaunchPath:scriptFilePath];
+    NSMutableDictionary *env = [[NSMutableDictionary alloc] init];
+    [env addEntriesFromDictionary:[[NSProcessInfo processInfo] environment]];
+    [env setObject:[NSString stringWithFormat:@"%@", self.device.UDID.UUIDString] forKey:@"BP_DEVICE_ID"];
+    [env setObject:[NSString stringWithFormat:@"%@", self.device.devicePath] forKey:@"BP_DEVICE_PATH"];
+    [task setEnvironment:env];
+
+    [task launch];
+    [task waitUntilExit];
+    int status = [task terminationStatus];
+    [BPUtils printInfo:INFO withString:@"Script (%@) has finished with exit code %d.",
+         scriptFilePath, [task terminationStatus]];
+
+    if (status != 0) {
+        [BPUtils printInfo:ERROR withString:@"Failed running script: %@", scriptFilePath];
+    }
+}
+
 - (BOOL)useSimulatorWithDeviceUDID:(NSUUID *)deviceUDID {
     self.device = [self findDeviceWithConfig:self.config andDeviceID:deviceUDID];
     if (!self.device) {
diff --git a/Source/Shared/BPConfiguration.h b/Source/Shared/BPConfiguration.h
index edc7f477..9a9b6d55 100644
--- a/Source/Shared/BPConfiguration.h
+++ b/Source/Shared/BPConfiguration.h
@@ -67,6 +67,7 @@ typedef NS_ENUM(NSInteger, BPProgram) {
 @property (nonatomic, strong) NSString *outputDirectory;
 @property (nonatomic, strong) NSString *screenshotsDirectory;
 @property (nonatomic, strong) NSString *simulatorPreferencesFile;
+@property (nonatomic, strong) NSString *scriptFilePath;
 @property (nonatomic) BOOL headlessMode;
 @property (nonatomic) BOOL cloneSimulator;
 @property (nonatomic, strong) NSNumber *numSims;
diff --git a/Source/Shared/BPConfiguration.m b/Source/Shared/BPConfiguration.m
index 33a45dca..06112802 100644
--- a/Source/Shared/BPConfiguration.m
+++ b/Source/Shared/BPConfiguration.m
@@ -141,6 +141,8 @@ typedef NS_OPTIONS(NSUInteger, BPOptionType) {
         "Directory where simulator screenshots for failed ui tests will be stored"},
     {362, "simulator-preferences-file", BP_MASTER | BP_SLAVE, NO, NO, required_argument, NULL, BP_VALUE | BP_PATH, "simulatorPreferencesFile",
             "A .GlobalPreferences.plist simulator preferences file to be copied to any newly created simulators before booting"},
+    {363, "script-file", BP_MASTER | BP_SLAVE, NO, NO, required_argument, NULL, BP_VALUE | BP_PATH, "scriptFilePath",
+        "A script that will be called after the simulator is booted, but before tests are run. Can be used to do any setup (e.g. installing certs). The environment will contain $BP_DEVICE_ID with the ID of the simulator and $BP_DEVICE_PATH with its full path. Exit with zero for success and non-zero for failure."},
 
     {0, 0, 0, 0, 0, 0, 0}
 };
@@ -718,6 +720,24 @@ - (BOOL)validateConfigWithError:(NSError *__autoreleasing *)err {
         }
     }
 
+    if (self.scriptFilePath) {
+        if ([[NSFileManager defaultManager] fileExistsAtPath:self.scriptFilePath isDirectory:&isdir]) {
+            if (isdir) {
+                BP_SET_ERROR(err, @"%@ is a directory.", self.scriptFilePath);
+                return NO;
+            }
+
+            if (![[NSFileManager defaultManager] isExecutableFileAtPath:self.scriptFilePath]) {
+                BP_SET_ERROR(err, @"%@ is not executable.", self.scriptFilePath);
+                return NO;
+            }
+
+        } else {
+            BP_SET_ERROR(err, @"%@ doesn't exist", self.scriptFilePath);
+            return NO;
+        }
+    }
+
     if (!self.xcTestRunDict && self.schemePath) {
         if ([[NSFileManager defaultManager] fileExistsAtPath:self.schemePath isDirectory:&isdir]) {
             if (isdir) {