diff --git a/integration_test/test_helper.exs b/integration_test/test_helper.exs
index 1b32ca9..b8f9a61 100644
--- a/integration_test/test_helper.exs
+++ b/integration_test/test_helper.exs
@@ -91,7 +91,6 @@ excludes = [
   :lock_for_migrations,
 
   # Migration we don't support
-  :prefix,
   :add_column_if_not_exists,
   :remove_column_if_exists,
   :alter_primary_key,
diff --git a/lib/ecto/adapters/sqlite3/connection.ex b/lib/ecto/adapters/sqlite3/connection.ex
index 98e991b..3b9670f 100644
--- a/lib/ecto/adapters/sqlite3/connection.ex
+++ b/lib/ecto/adapters/sqlite3/connection.ex
@@ -1826,7 +1826,7 @@ defmodule Ecto.Adapters.SQLite3.Connection do
       " CONSTRAINT ",
       reference_name(ref, table, name),
       " REFERENCES ",
-      quote_table(ref.prefix || table.prefix, ref.table),
+      quote_table(nil, ref.table),
       ?(,
       quote_name(ref.column),
       ?),
@@ -1945,8 +1945,8 @@ defmodule Ecto.Adapters.SQLite3.Connection do
 
   defp quote_table(nil, name), do: quote_entity(name)
 
-  defp quote_table(prefix, _name) when is_atom(prefix) or is_binary(prefix) do
-    raise ArgumentError, "SQLite3 does not support table prefixes"
+  defp quote_table(prefix, name) when is_atom(prefix) or is_binary(prefix) do
+    [prefix, ?., name]
   end
 
   defp quote_table(_, name), do: quote_entity(name)
diff --git a/test/ecto/adapters/sqlite3/connection/delete_all_test.exs b/test/ecto/adapters/sqlite3/connection/delete_all_test.exs
index d73ea7f..5f4a22f 100644
--- a/test/ecto/adapters/sqlite3/connection/delete_all_test.exs
+++ b/test/ecto/adapters/sqlite3/connection/delete_all_test.exs
@@ -65,20 +65,20 @@ defmodule Ecto.Adapters.SQLite3.Connection.DeleteAllTest do
   end
 
   test "delete all with prefix" do
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
+    query =
       Schema
       |> Ecto.Queryable.to_query()
       |> Map.put(:prefix, "prefix")
       |> plan()
-      |> delete_all()
-    end
 
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
+    assert ~s{DELETE FROM prefix.schema AS s0} == delete_all(query)
+
+    query =
       Schema
       |> from(prefix: "first")
       |> Map.put(:prefix, "prefix")
       |> plan()
-      |> delete_all()
-    end
+
+    assert ~s{DELETE FROM first.schema AS s0} == delete_all(query)
   end
 end
diff --git a/test/ecto/adapters/sqlite3/connection/insert_test.exs b/test/ecto/adapters/sqlite3/connection/insert_test.exs
index 5e954eb..9748ef6 100644
--- a/test/ecto/adapters/sqlite3/connection/insert_test.exs
+++ b/test/ecto/adapters/sqlite3/connection/insert_test.exs
@@ -25,9 +25,8 @@ defmodule Ecto.Adapters.SQLite3.Connection.InsertTest do
     query = insert(nil, "schema", [], [[]], {:raise, [], []}, [])
     assert query == ~s{INSERT INTO "schema" DEFAULT VALUES}
 
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
-      insert("prefix", "schema", [], [[]], {:raise, [], []}, [])
-    end
+    query = insert("prefix", "schema", [], [[]], {:raise, [], []}, [])
+    assert query == ~s{INSERT INTO prefix.schema DEFAULT VALUES}
 
     query = insert(nil, "schema", [:x, :y], [[:x, :y]], {:raise, [], []}, [:id])
     assert query == ~s{INSERT INTO "schema" ("x","y") VALUES (?1,?2) RETURNING "id"}
diff --git a/test/ecto/adapters/sqlite3/connection/join_test.exs b/test/ecto/adapters/sqlite3/connection/join_test.exs
index 7868272..7c1f3bf 100644
--- a/test/ecto/adapters/sqlite3/connection/join_test.exs
+++ b/test/ecto/adapters/sqlite3/connection/join_test.exs
@@ -114,25 +114,27 @@ defmodule Ecto.Adapters.SQLite3.Connection.JoinTest do
              ~s{) AS s1 ON 1} == all(query)
   end
 
-  test "join with prefix is not supported" do
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
+  test "join with prefix" do
+    query =
       Schema
       |> join(:inner, [p], q in Schema2, on: p.x == q.z)
       |> select([], true)
       |> Map.put(:prefix, "prefix")
       |> plan()
-      |> all()
-    end
 
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
+    assert ~s{SELECT 1 FROM prefix.schema AS s0 INNER JOIN prefix.schema2 AS s1 ON s0."x" = s1."z"} ==
+             all(query)
+
+    query =
       Schema
       |> from(prefix: "first")
       |> join(:inner, [p], q in Schema2, on: p.x == q.z, prefix: "second")
       |> select([], true)
       |> Map.put(:prefix, "prefix")
       |> plan()
-      |> all()
-    end
+
+    assert ~s{SELECT 1 FROM first.schema AS s0 INNER JOIN second.schema2 AS s1 ON s0."x" = s1."z"} ==
+             all(query)
   end
 
   test "join with values" do
diff --git a/test/ecto/adapters/sqlite3/connection/migration_test.exs b/test/ecto/adapters/sqlite3/connection/migration_test.exs
index 73826d8..98cc7bb 100644
--- a/test/ecto/adapters/sqlite3/connection/migration_test.exs
+++ b/test/ecto/adapters/sqlite3/connection/migration_test.exs
@@ -43,9 +43,12 @@ defmodule Ecto.Adapters.SQLite3.Connection.MigrationTest do
       {:create, table(:posts, prefix: :foo),
        [{:add, :category_0, %Reference{table: :categories}, []}]}
 
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
-      execute_ddl(create)
-    end
+    assert execute_ddl(create) == [
+             """
+             CREATE TABLE foo.posts ("category_0" INTEGER CONSTRAINT "posts_category_0_fkey" REFERENCES foo.categories("id"))
+             """
+             |> remove_newlines
+           ]
   end
 
   test "create table with references" do
@@ -295,10 +298,7 @@ defmodule Ecto.Adapters.SQLite3.Connection.MigrationTest do
 
   test "drop table with prefix" do
     drop = {:drop, table(:posts, prefix: :foo)}
-
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
-      execute_ddl(drop)
-    end
+    assert execute_ddl(drop) == [~s|DROP TABLE foo.posts|]
   end
 
   test "alter table" do
@@ -328,9 +328,9 @@ defmodule Ecto.Adapters.SQLite3.Connection.MigrationTest do
       {:alter, table(:posts, prefix: :foo),
        [{:add, :author_id, %Reference{table: :author}, []}]}
 
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
-      execute_ddl(alter)
-    end
+    assert execute_ddl(alter) == [
+             ~s|ALTER TABLE foo.posts ADD COLUMN "author_id" INTEGER CONSTRAINT "posts_author_id_fkey" REFERENCES foo.author("id")|
+           ]
   end
 
   test "alter table with serial primary key" do
@@ -374,16 +374,16 @@ defmodule Ecto.Adapters.SQLite3.Connection.MigrationTest do
   test "create index with prefix" do
     create = {:create, index(:posts, [:category_id, :permalink], prefix: :foo)}
 
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
-      execute_ddl(create)
-    end
+    assert execute_ddl(create) == [
+             ~s|CREATE INDEX "posts_category_id_permalink_index" ON foo.posts ("category_id", "permalink")|
+           ]
 
     create =
       {:create, index(:posts, ["lower(permalink)"], name: "posts$main", prefix: :foo)}
 
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
-      execute_ddl(create)
-    end
+    assert execute_ddl(create) == [
+             ~s|CREATE INDEX "posts$main" ON foo.posts (lower(permalink))|
+           ]
   end
 
   test "create index with comment" do
@@ -470,10 +470,7 @@ defmodule Ecto.Adapters.SQLite3.Connection.MigrationTest do
 
   test "drop index with prefix" do
     drop = {:drop, index(:posts, [:id], name: "posts$main", prefix: :foo), :restrict}
-
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
-      execute_ddl(drop)
-    end
+    assert execute_ddl(drop) == [~s|DROP INDEX foo.posts$main|]
   end
 
   test "drop index concurrently not supported" do
@@ -516,10 +513,7 @@ defmodule Ecto.Adapters.SQLite3.Connection.MigrationTest do
 
   test "rename table with prefix" do
     rename = {:rename, table(:posts, prefix: :foo), table(:new_posts, prefix: :foo)}
-
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
-      execute_ddl(rename)
-    end
+    assert execute_ddl(rename) == [~s|ALTER TABLE foo.posts RENAME TO "new_posts"|]
   end
 
   test "rename column" do
@@ -533,9 +527,9 @@ defmodule Ecto.Adapters.SQLite3.Connection.MigrationTest do
   test "rename column in prefixed table" do
     rename = {:rename, table(:posts, prefix: :foo), :given_name, :first_name}
 
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
-      execute_ddl(rename)
-    end
+    assert execute_ddl(rename) == [
+             ~s|ALTER TABLE foo.posts RENAME COLUMN "given_name" TO "first_name"|
+           ]
   end
 
   test "autoincrement support" do
diff --git a/test/ecto/adapters/sqlite3/connection/update_all_test.exs b/test/ecto/adapters/sqlite3/connection/update_all_test.exs
index 7fcb8f3..63071b6 100644
--- a/test/ecto/adapters/sqlite3/connection/update_all_test.exs
+++ b/test/ecto/adapters/sqlite3/connection/update_all_test.exs
@@ -123,12 +123,12 @@ defmodule Ecto.Adapters.SQLite3.Connection.UpdateAllTest do
   end
 
   test "update all with prefix" do
-    assert_raise ArgumentError, "SQLite3 does not support table prefixes", fn ->
+    query =
       from(m in Schema, update: [set: [x: 0]])
       |> Map.put(:prefix, "prefix")
       |> plan(:update_all)
-      |> update_all()
-    end
+
+    assert ~s{UPDATE prefix.schema AS s0 SET "x" = 0} == update_all(query)
   end
 
   test "update all with left join" do