diff --git a/Tests/TwitterAPIKitTests/APIv1/Collection/GetCollectionsEntriesRequestV1Tests.swift b/Tests/TwitterAPIKitTests/APIv1/Collection/GetCollectionsEntriesRequestV1Tests.swift
new file mode 100644
index 0000000..935cd0a
--- /dev/null
+++ b/Tests/TwitterAPIKitTests/APIv1/Collection/GetCollectionsEntriesRequestV1Tests.swift
@@ -0,0 +1,46 @@
+import TwitterAPIKit
+import XCTest
+
+class GetCollectionsEntriesRequestV1Tests: XCTestCase {
+    override func setUpWithError() throws {
+    }
+
+    override func tearDownWithError() throws {
+    }
+
+    func test() throws {
+        let req = GetCollectionsEntriesRequestV1(
+            id: "_i_",
+            count: 12,
+            maxPosition: "_m_",
+            minPosition: "_m_"
+        )
+
+        XCTAssertEqual(req.method, .get)
+        XCTAssertEqual(req.baseURLType, .api)
+        XCTAssertEqual(req.path, "/1.1/collections/entries.json")
+        XCTAssertEqual(req.bodyContentType, .wwwFormUrlEncoded)
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "_i_",
+                "count": 12,
+                "max_position": "_m_",
+                "min_position": "_m_",
+            ]
+        )
+    }
+
+    func testDefaultArg() throws {
+        let req = GetCollectionsEntriesRequestV1(
+            id: "i"
+        )
+
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "i"
+            ]
+        )
+    }
+}
diff --git a/Tests/TwitterAPIKitTests/APIv1/Collection/GetCollectionsListRequestV1Tests.swift b/Tests/TwitterAPIKitTests/APIv1/Collection/GetCollectionsListRequestV1Tests.swift
new file mode 100644
index 0000000..11ae145
--- /dev/null
+++ b/Tests/TwitterAPIKitTests/APIv1/Collection/GetCollectionsListRequestV1Tests.swift
@@ -0,0 +1,46 @@
+import TwitterAPIKit
+import XCTest
+
+class GetCollectionsListRequestV1Tests: XCTestCase {
+    override func setUpWithError() throws {
+    }
+
+    override func tearDownWithError() throws {
+    }
+
+    func test() throws {
+        let req = GetCollectionsListRequestV1(
+            user: .userID("uid"),
+            count: 14,
+            cursor: "_c_",
+            tweetID: "_t_"
+        )
+
+        XCTAssertEqual(req.method, .get)
+        XCTAssertEqual(req.baseURLType, .api)
+        XCTAssertEqual(req.path, "/1.1/collections/list.json")
+        XCTAssertEqual(req.bodyContentType, .wwwFormUrlEncoded)
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "user_id": "uid",
+                "count": 14,
+                "cursor": "_c_",
+                "tweet_id": "_t_",
+            ]
+        )
+    }
+
+    func testDefaultArg() throws {
+        let req = GetCollectionsListRequestV1(
+            user: .screenName("s")
+        )
+
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "screen_name": "s"
+            ]
+        )
+    }
+}
diff --git a/Tests/TwitterAPIKitTests/APIv1/Collection/GetCollectionsShowRequestV1Tests.swift b/Tests/TwitterAPIKitTests/APIv1/Collection/GetCollectionsShowRequestV1Tests.swift
new file mode 100644
index 0000000..675de24
--- /dev/null
+++ b/Tests/TwitterAPIKitTests/APIv1/Collection/GetCollectionsShowRequestV1Tests.swift
@@ -0,0 +1,27 @@
+import TwitterAPIKit
+import XCTest
+
+class GetCollectionsShowRequestV1Tests: XCTestCase {
+    override func setUpWithError() throws {
+    }
+
+    override func tearDownWithError() throws {
+    }
+
+    func test() throws {
+        let req = GetCollectionsShowRequestV1(
+            id: "_i_"
+        )
+
+        XCTAssertEqual(req.method, .get)
+        XCTAssertEqual(req.baseURLType, .api)
+        XCTAssertEqual(req.path, "/1.1/collections/show.json")
+        XCTAssertEqual(req.bodyContentType, .wwwFormUrlEncoded)
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "_i_"
+            ]
+        )
+    }
+}
diff --git a/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsCreateRequestV1Tests.swift b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsCreateRequestV1Tests.swift
new file mode 100644
index 0000000..7e3546d
--- /dev/null
+++ b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsCreateRequestV1Tests.swift
@@ -0,0 +1,46 @@
+import TwitterAPIKit
+import XCTest
+
+class PostCollectionsCreateRequestV1Tests: XCTestCase {
+    override func setUpWithError() throws {
+    }
+
+    override func tearDownWithError() throws {
+    }
+
+    func test() throws {
+        let req = PostCollectionsCreateRequestV1(
+            name: "_n_",
+            url: "_u_",
+            description: "_d_",
+            timelineOrder: .curationReverseChron
+        )
+
+        XCTAssertEqual(req.method, .post)
+        XCTAssertEqual(req.baseURLType, .api)
+        XCTAssertEqual(req.path, "/1.1/collections/create.json")
+        XCTAssertEqual(req.bodyContentType, .wwwFormUrlEncoded)
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "name": "_n_",
+                "url": "_u_",
+                "description": "_d_",
+                "timeline_order": "curation_reverse_chron",
+            ]
+        )
+    }
+
+    func testDefaultArg() throws {
+        let req = PostCollectionsCreateRequestV1(
+            name: "n"
+        )
+
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "name": "n"
+            ]
+        )
+    }
+}
diff --git a/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsDestroyRequestV1Tests.swift b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsDestroyRequestV1Tests.swift
new file mode 100644
index 0000000..85a4bd8
--- /dev/null
+++ b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsDestroyRequestV1Tests.swift
@@ -0,0 +1,27 @@
+import TwitterAPIKit
+import XCTest
+
+class PostCollectionsDestroyRequestV1Tests: XCTestCase {
+    override func setUpWithError() throws {
+    }
+
+    override func tearDownWithError() throws {
+    }
+
+    func test() throws {
+        let req = PostCollectionsDestroyRequestV1(
+            id: "_i_"
+        )
+
+        XCTAssertEqual(req.method, .post)
+        XCTAssertEqual(req.baseURLType, .api)
+        XCTAssertEqual(req.path, "/1.1/collections/destroy.json")
+        XCTAssertEqual(req.bodyContentType, .wwwFormUrlEncoded)
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "_i_"
+            ]
+        )
+    }
+}
diff --git a/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesAddRequestV1Tests.swift b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesAddRequestV1Tests.swift
new file mode 100644
index 0000000..8d4c917
--- /dev/null
+++ b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesAddRequestV1Tests.swift
@@ -0,0 +1,48 @@
+import TwitterAPIKit
+import XCTest
+
+class PostCollectionsEntriesAddRequestV1Tests: XCTestCase {
+    override func setUpWithError() throws {
+    }
+
+    override func tearDownWithError() throws {
+    }
+
+    func test() throws {
+        let req = PostCollectionsEntriesAddRequestV1(
+            id: "_i_",
+            tweetID: "_t_",
+            above: true,
+            relativeTo: "_r_"
+        )
+
+        XCTAssertEqual(req.method, .post)
+        XCTAssertEqual(req.baseURLType, .api)
+        XCTAssertEqual(req.path, "/1.1/collections/entries/add.json")
+        XCTAssertEqual(req.bodyContentType, .wwwFormUrlEncoded)
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "_i_",
+                "tweet_id": "_t_",
+                "above": true,
+                "relative_to": "_r_",
+            ]
+        )
+    }
+
+    func testDefaultArg() throws {
+        let req = PostCollectionsEntriesAddRequestV1(
+            id: "_i_",
+            tweetID: "_t_"
+        )
+
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "_i_",
+                "tweet_id": "_t_",
+            ]
+        )
+    }
+}
diff --git a/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesCurateRequestV1Tests.swift b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesCurateRequestV1Tests.swift
new file mode 100644
index 0000000..1b2e07b
--- /dev/null
+++ b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesCurateRequestV1Tests.swift
@@ -0,0 +1,35 @@
+import TwitterAPIKit
+import XCTest
+
+class PostCollectionsEntriesCurateRequestV1Tests: XCTestCase {
+    override func setUpWithError() throws {
+    }
+
+    override func tearDownWithError() throws {
+    }
+
+    func test() throws {
+        let req = PostCollectionsEntriesCurateRequestV1(
+            id: "_i_",
+            changes: [
+                .add(tweetID: "add_id"),
+                .remove(tweetID: "remove_id"),
+            ]
+        )
+
+        XCTAssertEqual(req.method, .post)
+        XCTAssertEqual(req.baseURLType, .api)
+        XCTAssertEqual(req.path, "/1.1/collections/entries/curate.json")
+        XCTAssertEqual(req.bodyContentType, .json)
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "_i_",
+                "changes": [
+                    ["op": "add", "tweet_id": "add_id"],
+                    ["op": "remove", "tweet_id": "remove_id"],
+                ],
+            ]
+        )
+    }
+}
diff --git a/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesMoveRequestV1Tests.swift b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesMoveRequestV1Tests.swift
new file mode 100644
index 0000000..0ae12a6
--- /dev/null
+++ b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesMoveRequestV1Tests.swift
@@ -0,0 +1,50 @@
+import TwitterAPIKit
+import XCTest
+
+class PostCollectionsEntriesMoveRequestV1Tests: XCTestCase {
+    override func setUpWithError() throws {
+    }
+
+    override func tearDownWithError() throws {
+    }
+
+    func test() throws {
+        let req = PostCollectionsEntriesMoveRequestV1(
+            id: "_i_",
+            tweetID: "_t_",
+            above: true,
+            relativeTo: "_r_"
+        )
+
+        XCTAssertEqual(req.method, .post)
+        XCTAssertEqual(req.baseURLType, .api)
+        XCTAssertEqual(req.path, "/1.1/collections/entries/move.json")
+        XCTAssertEqual(req.bodyContentType, .wwwFormUrlEncoded)
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "_i_",
+                "tweet_id": "_t_",
+                "above": true,
+                "relative_to": "_r_",
+            ]
+        )
+    }
+
+    func testDefaultArg() throws {
+        let req = PostCollectionsEntriesMoveRequestV1(
+            id: "_i_",
+            tweetID: "_t_",
+            relativeTo: "_r_"
+        )
+
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "_i_",
+                "tweet_id": "_t_",
+                "relative_to": "_r_",
+            ]
+        )
+    }
+}
diff --git a/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesRemoveRequestV1Tests.swift b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesRemoveRequestV1Tests.swift
new file mode 100644
index 0000000..62b4016
--- /dev/null
+++ b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsEntriesRemoveRequestV1Tests.swift
@@ -0,0 +1,29 @@
+import TwitterAPIKit
+import XCTest
+
+class PostCollectionsEntriesRemoveRequestV1Tests: XCTestCase {
+    override func setUpWithError() throws {
+    }
+
+    override func tearDownWithError() throws {
+    }
+
+    func test() throws {
+        let req = PostCollectionsEntriesRemoveRequestV1(
+            id: "_i_",
+            tweetID: "_t_"
+        )
+
+        XCTAssertEqual(req.method, .post)
+        XCTAssertEqual(req.baseURLType, .api)
+        XCTAssertEqual(req.path, "/1.1/collections/entries/remove.json")
+        XCTAssertEqual(req.bodyContentType, .wwwFormUrlEncoded)
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "_i_",
+                "tweet_id": "_t_",
+            ]
+        )
+    }
+}
diff --git a/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsUpdateRequestV1Tests.swift b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsUpdateRequestV1Tests.swift
new file mode 100644
index 0000000..d8ae22d
--- /dev/null
+++ b/Tests/TwitterAPIKitTests/APIv1/Collection/PostCollectionsUpdateRequestV1Tests.swift
@@ -0,0 +1,46 @@
+import TwitterAPIKit
+import XCTest
+
+class PostCollectionsUpdateRequestV1Tests: XCTestCase {
+    override func setUpWithError() throws {
+    }
+
+    override func tearDownWithError() throws {
+    }
+
+    func test() throws {
+        let req = PostCollectionsUpdateRequestV1(
+            id: "_i_",
+            url: "_u_",
+            name: "_n_",
+            description: "_d_"
+        )
+
+        XCTAssertEqual(req.method, .post)
+        XCTAssertEqual(req.baseURLType, .api)
+        XCTAssertEqual(req.path, "/1.1/collections/update.json")
+        XCTAssertEqual(req.bodyContentType, .wwwFormUrlEncoded)
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "_i_",
+                "url": "_u_",
+                "name": "_n_",
+                "description": "_d_",
+            ]
+        )
+    }
+
+    func testDefaultArg() throws {
+        let req = PostCollectionsUpdateRequestV1(
+            id: "i"
+        )
+
+        AssertEqualAnyDict(
+            req.parameters,
+            [
+                "id": "i"
+            ]
+        )
+    }
+}