diff --git a/Tests/Foundation/TestDateFormatter.swift b/Tests/Foundation/TestDateFormatter.swift
index c495831303..1695f3ecac 100644
--- a/Tests/Foundation/TestDateFormatter.swift
+++ b/Tests/Foundation/TestDateFormatter.swift
@@ -331,6 +331,8 @@ class TestDateFormatter: XCTestCase {
         XCTAssertNotNil(result)
     }
 
+// Test disabled due to Amazon Linux failures (rdar://132784697)
+#if false
     func test_setTimeZoneToNil() {
         let f = DateFormatter()
         // Time zone should be the system one by default.
@@ -339,6 +341,7 @@ class TestDateFormatter: XCTestCase {
         // Time zone should go back to the system one.
         XCTAssertEqual(f.timeZone, NSTimeZone.system)
     }
+#endif
 
     func test_setTimeZone() {
         // Test two different time zones. Should ensure that if one
diff --git a/Tests/Foundation/TestTimeZone.swift b/Tests/Foundation/TestTimeZone.swift
index 0fd100bfc7..6d2fbaf2ae 100644
--- a/Tests/Foundation/TestTimeZone.swift
+++ b/Tests/Foundation/TestTimeZone.swift
@@ -156,7 +156,8 @@ class TestTimeZone: XCTestCase {
         XCTAssertEqual(actualIdentifier, expectedIdentifier, "expected identifier \"\(expectedIdentifier)\" is not equal to \"\(actualIdentifier as Optional)\"")
     }
 
-#if !os(Windows)
+// Test disabled due to Amazon Linux failures (rdar://132784697)
+#if !os(Windows) && false
     func test_systemTimeZoneUsesSystemTime() {
         tzset()
         var t = time(nil)